diff --git a/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushContentDto.java b/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushContentDto.java
index 6a38b4c4..baa0bd8e 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushContentDto.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushContentDto.java
@@ -1,6 +1,7 @@
 package com.cozymate.cozymate_server.domain.fcm.dto;
 
 import com.cozymate.cozymate_server.domain.member.Member;
+import com.cozymate.cozymate_server.domain.room.Room;
 import java.util.List;
 import lombok.Getter;
 
@@ -10,11 +11,20 @@ public class FcmPushContentDto {
     private Member member;
     private String roleContent;
     private List<String> todoContents;
+    private Room room;
+
+    private FcmPushContentDto(Member member, Room room) {
+        this.member = member;
+        this.room = room;
+        roleContent = null;
+        todoContents = null;
+    }
 
     private FcmPushContentDto(Member member) {
         this.member = member;
         roleContent = null;
         todoContents = null;
+        room = null;
     }
 
     // 투두 내용 리스트로 전부 줘야하는 경우, 00시 투드 리스트 스케줄러
@@ -22,6 +32,7 @@ private FcmPushContentDto(Member member, List<String> todoContents) {
         this.member = member;
         this.todoContents = todoContents;
         roleContent = null;
+        room = null;
     }
 
     // 롤 내용 하나만 줘야하는 경우, 21시 미완료 Role 한개만 리마인더 스케줄러
@@ -29,6 +40,7 @@ private FcmPushContentDto(Member member, String roleContent) {
         this.member= member;
         this.roleContent = roleContent;
         todoContents = null;
+        room = null;
     }
 
     private FcmPushContentDto() {
@@ -46,6 +58,10 @@ public static FcmPushContentDto create(Member member, List<String> todoContents)
         return new FcmPushContentDto(member, todoContents);
     }
 
+    public static FcmPushContentDto create(Member member, Room room) {
+        return new FcmPushContentDto(member, room);
+    }
+
     // 방이 열렸어요 -> 에서 사용합니다!
     public static FcmPushContentDto create() {
         return new FcmPushContentDto();
diff --git a/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushTargetDto.java b/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushTargetDto.java
index afb214aa..e715294f 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushTargetDto.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/fcm/dto/FcmPushTargetDto.java
@@ -2,6 +2,7 @@
 
 import com.cozymate.cozymate_server.domain.member.Member;
 import com.cozymate.cozymate_server.domain.notificationlog.enums.NotificationType;
+import com.cozymate.cozymate_server.domain.room.Room;
 import java.util.List;
 import lombok.Getter;
 
@@ -134,5 +135,25 @@ public static GroupWithOutMeTargetDto create(Member me, List<Member> memberList,
         }
     }
 
+    @Getter
+    public static class GroupRoomNameWithOutMeTargetDto {
 
+        private final Member me;
+        private final List<Member> memberList;
+        private final Room room;
+        private final NotificationType notificationType;
+
+        private GroupRoomNameWithOutMeTargetDto(Member me, List<Member> memberList, Room room,
+            NotificationType notificationType) {
+            this.me = me;
+            this.memberList = memberList;
+            this.room = room;
+            this.notificationType = notificationType;
+        }
+
+        public static GroupRoomNameWithOutMeTargetDto create(Member me, List<Member> memberList,
+            Room room, NotificationType notificationType) {
+            return new GroupRoomNameWithOutMeTargetDto(me, memberList, room, notificationType);
+        }
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/cozymate/cozymate_server/domain/fcm/service/FcmPushService.java b/src/main/java/com/cozymate/cozymate_server/domain/fcm/service/FcmPushService.java
index 518a6e89..91a4fb54 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/fcm/service/FcmPushService.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/fcm/service/FcmPushService.java
@@ -2,6 +2,7 @@
 
 import com.cozymate.cozymate_server.domain.fcm.Fcm;
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushContentDto;
+import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupRoomNameWithOutMeTargetDto;
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupWithOutMeTargetDto;
 import com.cozymate.cozymate_server.domain.fcm.repository.FcmRepository;
 import com.cozymate.cozymate_server.domain.member.Member;
@@ -11,10 +12,10 @@
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupTargetDto;
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.OneTargetReverseDto;
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.OneTargetDto;
+import com.cozymate.cozymate_server.domain.room.Room;
 import com.google.firebase.messaging.FirebaseMessaging;
 import com.google.firebase.messaging.FirebaseMessagingException;
 import com.google.firebase.messaging.Message;
-import com.google.firebase.messaging.Notification;
 import java.util.HashMap;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -260,4 +261,78 @@ private String getContent(Member member, NotificationType notificationType,
         return notificationType.generateContent(
             FcmPushContentDto.create(member, todoContents));
     }
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    /**
+     * 방 입장 시 : 방에 속한 메이트 모두에게 [방이름]에 [닉네임]님이 뛰어들어왔어요! 알림 전송
+     */
+    public void sendNotification(GroupRoomNameWithOutMeTargetDto target) {
+        List<Member> memberList = target.getMemberList(); // 알림을 받을 멤버 리스트
+        Member me = target.getMe(); // 알림 내용에 들어갈 멤버 (의 이름)
+        Room room = target.getRoom(); // 알림 내용에 들어갈 방 (의 이름)
+
+        memberList.forEach(member -> {
+            sendNotificationToMember(me, room, member, target.getNotificationType());
+        });
+    }
+
+    private void sendNotificationToMember(Member contentMember, Room room, Member recipientMember,
+        NotificationType notificationType) {
+        List<Message> messages = createMessage(contentMember, room, recipientMember, notificationType);
+
+        messages.forEach(message -> {
+            try {
+                firebaseMessaging.send(message);
+            } catch (FirebaseMessagingException e) {
+                log.error("cannot send to member push message. error info : {}", e.getMessage());
+            }
+        });
+
+        NotificationLog notificationLog = NotificationLog.builder()
+            .member(recipientMember)
+            .category(notificationType.getCategory())
+            .content(getContent(contentMember, room, notificationType))
+            .build();
+
+        notificationLogRepository.save(notificationLog);
+    }
+
+    private List<Message> createMessage(Member contentMember, Room room, Member recipientMember, NotificationType notificationType) {
+        List<Fcm> fcmList = fcmRepository.findByMember(recipientMember);
+
+        List<Message> messages = fcmList.stream()
+            .map(fcm -> {
+                String token = fcm.getToken();
+                String content = getContent(contentMember, room, notificationType);
+
+                HashMap<String, String> messageMap = new HashMap<>();
+                messageMap.put("title", NOTIFICATION_TITLE);
+                messageMap.put("body", content);
+
+                return Message.builder()
+                    .putAllData(messageMap)
+                    .setToken(token)
+                    .build();
+            }).toList();
+
+        return messages;
+    }
+
+    private String getContent(Member member, Room room, NotificationType notificationType) {
+        return notificationType.generateContent(FcmPushContentDto.create(member, room));
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/cozymate/cozymate_server/domain/mate/repository/MateRepository.java b/src/main/java/com/cozymate/cozymate_server/domain/mate/repository/MateRepository.java
index c824cfa9..70dc9b53 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/mate/repository/MateRepository.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/mate/repository/MateRepository.java
@@ -51,4 +51,7 @@ Optional<Mate> findByMemberIdAndEntryStatusAndRoomStatusIn(Long memberId,
     List<Mate> findByRoom(Room room);
 
     Optional<Mate> findByMember(Member member);
+
+    @Query("select m from Mate m join fetch m.member")
+    List<Mate> findFetchAll();
 }
diff --git a/src/main/java/com/cozymate/cozymate_server/domain/notificationlog/enums/NotificationType.java b/src/main/java/com/cozymate/cozymate_server/domain/notificationlog/enums/NotificationType.java
index ef632925..cc0b944d 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/notificationlog/enums/NotificationType.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/notificationlog/enums/NotificationType.java
@@ -111,6 +111,15 @@ public String generateContent(FcmPushContentDto fcmPushContentDto) {
                 + builder.toString();
         }
     },
+
+    JOIN_ROOM(NotificationCategory.COZY_HOME) {
+        @Override
+        public String generateContent(FcmPushContentDto fcmPushContentDto) {
+            return getNicknameShowFormat(fcmPushContentDto.getRoom().getName()) + "에 "
+                + getNicknameShowFormat(fcmPushContentDto.getMember().getNickname())
+                +"님이 뛰어들어왔어요!";
+        }
+    }
     ;
 
     private NotificationCategory category;
diff --git a/src/main/java/com/cozymate/cozymate_server/domain/room/service/RoomCommandService.java b/src/main/java/com/cozymate/cozymate_server/domain/room/service/RoomCommandService.java
index 11b9bed4..f7e5e83a 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/room/service/RoomCommandService.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/room/service/RoomCommandService.java
@@ -1,5 +1,7 @@
 package com.cozymate.cozymate_server.domain.room.service;
 
+import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupRoomNameWithOutMeTargetDto;
+import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupWithOutMeTargetDto;
 import com.cozymate.cozymate_server.domain.feed.Feed;
 import com.cozymate.cozymate_server.domain.feed.converter.FeedConverter;
 import com.cozymate.cozymate_server.domain.feed.repository.FeedRepository;
@@ -11,6 +13,7 @@
 import com.cozymate.cozymate_server.domain.mate.repository.MateRepository;
 import com.cozymate.cozymate_server.domain.member.Member;
 import com.cozymate.cozymate_server.domain.member.repository.MemberRepository;
+import com.cozymate.cozymate_server.domain.notificationlog.enums.NotificationType;
 import com.cozymate.cozymate_server.domain.post.Post;
 import com.cozymate.cozymate_server.domain.post.repository.PostRepository;
 import com.cozymate.cozymate_server.domain.postcomment.PostCommentRepository;
@@ -33,6 +36,7 @@
 import java.util.List;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
+import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.stereotype.Service;
 
 @Service
@@ -57,6 +61,7 @@ public class RoomCommandService {
     private final FriendRepository friendRepository;
     private final RoomQueryService roomQueryService;
     private final RoomLogCommandService roomLogCommandService;
+    private final ApplicationEventPublisher eventPublisher;
 
     public RoomCreateResponse createRoom(RoomCreateRequest request, Member member) {
         Member creator = memberRepository.findById(member.getId())
@@ -107,6 +112,20 @@ public void joinRoom(Long roomId, Long memberId) {
         room.isRoomFull();
         roomRepository.save(room);
 
+        // Room의 Mate들을 찾아온다
+        List<Mate> findRoomMates = mateRepository.findByRoom(room);
+
+        List<Member> memberList = findRoomMates.stream()
+            .map(Mate::getMember)
+            .filter(findMember -> !findMember.getId().equals(member.getId()))
+            .toList();
+
+        // 알림 내용에는 현재 코드 상 member의 이름이 담겨야하고, 현재 코드 상의 room의 이름도 담긴다
+        // 알림을 받는 대상은 방에 있는 메이트들이다.
+        // 넘겨야 할 파라미터 = member, room, memberList(알림 받을 대상 멤버 리스트), NotificationType
+        eventPublisher.publishEvent(GroupRoomNameWithOutMeTargetDto.create(member, memberList, room,
+            NotificationType.JOIN_ROOM));
+
     }
 
     public void deleteRoom(Long roomId, Long memberId) {
diff --git a/src/main/java/com/cozymate/cozymate_server/domain/todo/repository/TodoRepository.java b/src/main/java/com/cozymate/cozymate_server/domain/todo/repository/TodoRepository.java
index 8de20fcf..76069c93 100644
--- a/src/main/java/com/cozymate/cozymate_server/domain/todo/repository/TodoRepository.java
+++ b/src/main/java/com/cozymate/cozymate_server/domain/todo/repository/TodoRepository.java
@@ -5,6 +5,8 @@
 import java.time.LocalDate;
 import java.util.List;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
 
 public interface TodoRepository extends JpaRepository<Todo, Long> {
 
@@ -14,10 +16,13 @@ public interface TodoRepository extends JpaRepository<Todo, Long> {
 
     Integer countAllByRoomIdAndMateIdAndTimePoint(Long roomId, Long mateId, LocalDate timePoint);
 
-    List<Todo> findByTimePoint(LocalDate today);
+    @Query("select t from Todo t join fetch t.mate m join fetch m.member where t.timePoint = :today")
+    List<Todo> findByTimePoint(@Param("today") LocalDate today);
 
-    List<Todo> findByTimePointAndRoleIsNotNull(LocalDate today);
+    @Query("select t from Todo t join fetch t.mate m join fetch m.member where t.timePoint = :today and t.role is not null and t.completed is false")
+    List<Todo> findByTimePointAndRoleIsNotNullCompletedFalse(@Param("today") LocalDate today);
 
-    boolean existsByMateAndTimePointAndCompletedFalse(Mate mate, LocalDate timePoint);
+    List<Todo>findByTimePointAndRoleIsNotNull(LocalDate today);
 
+    boolean existsByMateAndTimePointAndCompletedFalse(Mate mate, LocalDate timePoint);
 }
diff --git a/src/main/java/com/cozymate/cozymate_server/global/event/EventListener.java b/src/main/java/com/cozymate/cozymate_server/global/event/EventListener.java
index 91eba496..03c2ef63 100644
--- a/src/main/java/com/cozymate/cozymate_server/global/event/EventListener.java
+++ b/src/main/java/com/cozymate/cozymate_server/global/event/EventListener.java
@@ -1,5 +1,6 @@
 package com.cozymate.cozymate_server.global.event;
 
+import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupRoomNameWithOutMeTargetDto;
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupWithOutMeTargetDto;
 import com.cozymate.cozymate_server.domain.fcm.service.FcmPushService;
 import com.cozymate.cozymate_server.domain.fcm.dto.FcmPushTargetDto.GroupTargetDto;
@@ -51,4 +52,9 @@ public void sendNotification(OneTargetDto oneTargetDto) {
     public void sendNotification(GroupWithOutMeTargetDto groupWithOutMeTargetDto) {
         fcmPushService.sendNotification(groupWithOutMeTargetDto);
     }
+
+    @TransactionalEventListener
+    public void sendNotification(GroupRoomNameWithOutMeTargetDto groupRoomNameWithOutMeTargetDto) {
+        fcmPushService.sendNotification(groupRoomNameWithOutMeTargetDto);
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/com/cozymate/cozymate_server/global/scheduler/NotificationScheduler.java b/src/main/java/com/cozymate/cozymate_server/global/scheduler/NotificationScheduler.java
index 9523ab3c..af882ce4 100644
--- a/src/main/java/com/cozymate/cozymate_server/global/scheduler/NotificationScheduler.java
+++ b/src/main/java/com/cozymate/cozymate_server/global/scheduler/NotificationScheduler.java
@@ -25,10 +25,12 @@
 import java.util.function.Function;
 import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.annotation.Transactional;
 
+@Slf4j
 @Component
 @RequiredArgsConstructor
 @Transactional
@@ -42,7 +44,8 @@ public class NotificationScheduler {
     private final RoomRepository roomRepository;
     private final RoleRepository roleRepository;
 
-    @Scheduled(cron = "0 0 0 * * *")
+    // 매일 자정 반복 (해당하는 날 역할을 Todo에 추가) 작업 자정에 먼저하고 나서 시작하도록 30초로 설정
+    @Scheduled(cron = "30 0 0 * * *")
     public void sendDailyNotification() {
         LocalDate today = LocalDate.now();
         List<Todo> todoList = todoRepository.findByTimePoint(today);
@@ -62,10 +65,10 @@ public void sendDailyNotification() {
         });
     }
 
-    @Scheduled(cron = "0 0 22 * * *")
+    @Scheduled(cron = "0 0 21 * * *")
     public void sendReminderRoleNotification() {
         LocalDate today = LocalDate.now();
-        List<Todo> todoList = todoRepository.findByTimePointAndRoleIsNotNull(today);
+        List<Todo> todoList = todoRepository.findByTimePointAndRoleIsNotNullCompletedFalse(today);
 
         Map<Member, Todo> todoMap = todoList.stream()
             .filter(todo -> !todo.isCompleted())
@@ -92,7 +95,7 @@ public void addReminderRoleRoomLog() {
 
     @Scheduled(cron = "0 0 12 L * ?")
     public void sendMonthlyNotification() {
-        List<Mate> mates = mateRepository.findAll();
+        List<Mate> mates = mateRepository.findFetchAll();
 
         List<Member> memberList = mates.stream()
             .map(Mate::getMember)