diff --git a/src/main/java/com/gachtaxi/domain/members/service/MemberService.java b/src/main/java/com/gachtaxi/domain/members/service/MemberService.java
index 4605a030..70efc156 100644
--- a/src/main/java/com/gachtaxi/domain/members/service/MemberService.java
+++ b/src/main/java/com/gachtaxi/domain/members/service/MemberService.java
@@ -38,6 +38,8 @@ public MemberResponseDto getMember(Long currentId){
     @Transactional
     public MemberResponseDto updateMemberInfo(Long currentId, MemberInfoRequestDto dto){
         Members member = findById(currentId);
+        checkDuplicatedNickName(dto.nickName(), member);
+
         member.updateMemberInfo(dto);
 
         chattingMessageMongoRepository.updateMemberInfo(member);
@@ -122,4 +124,12 @@ private void checkDuplicatedNickName(String nickName) {
         });
     }
 
+    private void checkDuplicatedNickName(String nickName, Members member) {
+        memberRepository.findByNickname(nickName).ifPresent(m -> {
+            if (!m.equals(member)) {
+                throw new DuplicatedNickNameException();
+            }
+        });
+    }
+
 }