diff --git a/src/pages/modifyManage/ModifyManage.styled.ts b/src/pages/modifyManage/ModifyManage.styled.ts
index 5ebb6a46..83b2ad23 100644
--- a/src/pages/modifyManage/ModifyManage.styled.ts
+++ b/src/pages/modifyManage/ModifyManage.styled.ts
@@ -288,6 +288,7 @@ export const PreviewBanner = styled.div`
   ${Generators.flexGenerator()}
   position: sticky;
   top: 5.6rem;
+  z-index: 1;
   width: 37.5rem;
   padding: 0.8rem 6.7rem;
 
diff --git a/src/pages/register/Register.styled.ts b/src/pages/register/Register.styled.ts
index d1fec560..5a7bea78 100644
--- a/src/pages/register/Register.styled.ts
+++ b/src/pages/register/Register.styled.ts
@@ -290,6 +290,7 @@ export const PreviewBanner = styled.div`
   ${Generators.flexGenerator()}
   position: sticky;
   top: 5.6rem;
+  z-index: 1;
   width: 37.5rem;
   padding: 0.8rem 6.7rem;