diff --git a/src/main/java/cotato/growingpain/auth/service/AuthService.java b/src/main/java/cotato/growingpain/auth/service/AuthService.java
index c7f8133..f50a2db 100644
--- a/src/main/java/cotato/growingpain/auth/service/AuthService.java
+++ b/src/main/java/cotato/growingpain/auth/service/AuthService.java
@@ -110,6 +110,7 @@ public Token completeSignup(CompleteSignupRequest request, String accessToken) {
         if(member.getMemberRole() == MemberRole.PENDING){
             // 필드를 개별적으로 업데이트
             member.updateMemberInfo(request.name(), request.field(), request.belong(),request.job());
+            validateService.checkDuplicateNickName(request.name()); //닉네임 중복 체크
             member.updateRole(MemberRole.MEMBER);
             memberRepository.save(member);