diff --git a/src/main/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserService.java b/src/main/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserService.java
index 5a923142..3b809c55 100644
--- a/src/main/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserService.java
+++ b/src/main/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserService.java
@@ -3,6 +3,7 @@
 import org.springframework.security.crypto.password.PasswordEncoder;
 import org.springframework.transaction.annotation.Transactional;
 
+import com.plzgraduate.myongjigraduatebe.completedcredit.application.port.DeleteCompletedCreditPort;
 import com.plzgraduate.myongjigraduatebe.core.meta.UseCase;
 import com.plzgraduate.myongjigraduatebe.parsing.application.port.DeleteParsingTextHistoryPort;
 import com.plzgraduate.myongjigraduatebe.takenlecture.application.usecase.delete.DeleteTakenLectureUseCase;
@@ -22,6 +23,7 @@ class WithDrawUserService implements WithDrawUserUseCase {
 	private final DeleteTakenLectureUseCase deleteTakenLectureByUserUseCase;
 	private final DeleteParsingTextHistoryPort deleteParsingTextHistoryPort;
 	private final DeleteUserPort deleteUserPort;
+	private final DeleteCompletedCreditPort deleteCompletedCreditPort;
 	private final PasswordEncoder passwordEncoder;
 
 	@Override
@@ -30,6 +32,7 @@ public void withDraw(Long userId, String password) {
 		user.matchPassword(passwordEncoder, password);
 		deleteTakenLectureByUserUseCase.deleteAllTakenLecturesByUser(user);
 		deleteParsingTextHistoryPort.deleteUserParsingTextHistory(user);
+		deleteCompletedCreditPort.deleteAllCompletedCredits(user);
 		deleteUserPort.deleteUser(user);
 	}
 }
diff --git a/src/test/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserServiceTest.java b/src/test/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserServiceTest.java
index c380a037..0154bd10 100644
--- a/src/test/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserServiceTest.java
+++ b/src/test/java/com/plzgraduate/myongjigraduatebe/user/application/service/withdraw/WithDrawUserServiceTest.java
@@ -14,6 +14,7 @@
 import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
 import org.springframework.security.crypto.password.PasswordEncoder;
 
+import com.plzgraduate.myongjigraduatebe.completedcredit.application.port.DeleteCompletedCreditPort;
 import com.plzgraduate.myongjigraduatebe.parsing.application.port.DeleteParsingTextHistoryPort;
 import com.plzgraduate.myongjigraduatebe.takenlecture.application.usecase.delete.DeleteTakenLectureUseCase;
 import com.plzgraduate.myongjigraduatebe.user.application.port.DeleteUserPort;
@@ -32,6 +33,8 @@ class WithDrawUserServiceTest {
 	@Mock
 	private DeleteUserPort deleteUserPort;
 	@Mock
+	private DeleteCompletedCreditPort deleteCompletedCreditPort;
+	@Mock
 	private PasswordEncoder passwordEncoder;
 
 	@InjectMocks
@@ -53,6 +56,7 @@ void withDraw() {
 	    withDrawUserService.withDraw(user.getId(), password);
 		then(deleteTakenLectureByUserUseCase).should().deleteAllTakenLecturesByUser(user);
 		then(deleteParsingTextHistoryPort).should().deleteUserParsingTextHistory(user);
+		then(deleteCompletedCreditPort).should().deleteAllCompletedCredits(user);
 		then(deleteUserPort).should().deleteUser(user);
 	}