diff --git a/src/main/kotlin/com/toyProject7/karrot/profile/service/ProfileService.kt b/src/main/kotlin/com/toyProject7/karrot/profile/service/ProfileService.kt
index 1f34c57..4af7b8d 100644
--- a/src/main/kotlin/com/toyProject7/karrot/profile/service/ProfileService.kt
+++ b/src/main/kotlin/com/toyProject7/karrot/profile/service/ProfileService.kt
@@ -69,7 +69,7 @@ class ProfileService(
         user: User,
         request: EditProfileRequest,
     ): Profile {
-        if (user.nickname == request.nickname) {
+        if (user.nickname != request.nickname && userService.existUserEntityByNickname(request.nickname)) {
             throw ProfileEditNicknameConflictException()
         }
 
diff --git a/src/main/kotlin/com/toyProject7/karrot/user/service/UserService.kt b/src/main/kotlin/com/toyProject7/karrot/user/service/UserService.kt
index 1510012..e3ca5a6 100644
--- a/src/main/kotlin/com/toyProject7/karrot/user/service/UserService.kt
+++ b/src/main/kotlin/com/toyProject7/karrot/user/service/UserService.kt
@@ -179,4 +179,9 @@ class UserService(
     fun getUserEntityByNickname(nickname: String): UserEntity {
         return userRepository.findByNickname(nickname) ?: throw UserNotFoundException()
     }
+
+    @Transactional
+    fun existUserEntityByNickname(nickname: String): Boolean {
+        return userRepository.existsByNickname(nickname)
+    }
 }