diff --git a/src/main/java/com/hackathon/momento/member/api/MemberController.java b/src/main/java/com/hackathon/momento/member/api/MemberController.java
index 2975bd1..ce0b2ba 100644
--- a/src/main/java/com/hackathon/momento/member/api/MemberController.java
+++ b/src/main/java/com/hackathon/momento/member/api/MemberController.java
@@ -82,16 +82,16 @@ public RspTemplate<ProfileResDto> updateProfile(
 
     @PostMapping("/check-duplicate")
     @Operation(
-            summary = "이메일 중복 검사",
-            description = "해당 사용자가 존재하는지 여부를 검사합니다.",
+            summary = "최초 로그인 여부 체크",
+            description = "해당 사용자가 최초 로그인인지 체크합니다.",
             responses = {
-                    @ApiResponse(responseCode = "200", description = "중복 검사 성공"),
+                    @ApiResponse(responseCode = "200", description = "최초 로그인 여부 체크 성공"),
                     @ApiResponse(responseCode = "400", description = "잘못된 요청"),
                     @ApiResponse(responseCode = "500", description = "서버 오류")
             }
     )
     public RspTemplate<String> checkDuplicateRequest(Principal principal) {
         boolean isDuplicate = memberService.checkDuplicate(principal);
-        return new RspTemplate<>(HttpStatus.OK, String.valueOf(isDuplicate));
+        return new RspTemplate<>(HttpStatus.OK, "최초 로그인 여부 체크 성공", String.valueOf(isDuplicate));
     }
 }
diff --git a/src/main/java/com/hackathon/momento/member/application/MemberService.java b/src/main/java/com/hackathon/momento/member/application/MemberService.java
index d400bbc..65ff2e7 100644
--- a/src/main/java/com/hackathon/momento/member/application/MemberService.java
+++ b/src/main/java/com/hackathon/momento/member/application/MemberService.java
@@ -48,7 +48,7 @@ public ProfileResDto updateProfile(Principal principal, UpdateProfileReqDto reqD
 
     public boolean checkDuplicate(Principal principal) {
         Member member = getMemberByPrincipal(principal);
-        return memberRepository.existsById(member.getId());
+        return member.getStack() == null || member.getPersona() == null || member.getAbility() == null;
     }
 
     private Member getMemberByPrincipal(Principal principal) {
diff --git a/src/main/java/com/hackathon/momento/member/domain/repository/MemberRepository.java b/src/main/java/com/hackathon/momento/member/domain/repository/MemberRepository.java
index b9fd5fc..4412139 100644
--- a/src/main/java/com/hackathon/momento/member/domain/repository/MemberRepository.java
+++ b/src/main/java/com/hackathon/momento/member/domain/repository/MemberRepository.java
@@ -8,6 +8,5 @@
 @Repository
 public interface MemberRepository extends JpaRepository<Member, Long> {
 
-
     Optional<Member> findByEmail(String email);
 }