diff --git a/src/main/java/com/sptp/backend/oauth/service/KakaoService.java b/src/main/java/com/sptp/backend/oauth/service/KakaoService.java
index 9d614ab9..a4e1c932 100644
--- a/src/main/java/com/sptp/backend/oauth/service/KakaoService.java
+++ b/src/main/java/com/sptp/backend/oauth/service/KakaoService.java
@@ -152,12 +152,10 @@ public TokenDto loginWithKakao(KakaoTokenDto kakaoTokenDto) throws IOException {
         //DB에 해당 이메일 없을 경우 회원 가입 로직 실행
         if (!memberRepository.existsByEmail(email)) {
 
-            String uuid = UUID.randomUUID().toString().substring(0, 7);
-            String randomNickName = "user_" + uuid;
+            String randomNickName = UUID.randomUUID().toString().substring(0, 5);
 
             while (memberRepository.existsByNickname(randomNickName)) {
-                uuid = UUID.randomUUID().toString().substring(0, 7);
-                randomNickName = "user_" + uuid;
+                randomNickName = UUID.randomUUID().toString().substring(0, 5);
             }
 
             Member member = Member.builder()
diff --git a/src/main/java/com/sptp/backend/oauth/service/NaverService.java b/src/main/java/com/sptp/backend/oauth/service/NaverService.java
index aef97dff..612f8b1e 100644
--- a/src/main/java/com/sptp/backend/oauth/service/NaverService.java
+++ b/src/main/java/com/sptp/backend/oauth/service/NaverService.java
@@ -143,12 +143,10 @@ public TokenDto loginWithNaver(NaverTokenDto naverTokenDto) throws IOException {
         //DB에 해당 이메일 없을 경우 회원 가입 로직 실행
         if (!memberRepository.existsByEmail(email)) {
 
-            String uuid = UUID.randomUUID().toString().substring(0, 7);
-            String randomNickName = "user_" + uuid;
+            String randomNickName = UUID.randomUUID().toString().substring(0, 5);
 
             while (memberRepository.existsByNickname(randomNickName)) {
-                uuid = UUID.randomUUID().toString().substring(0, 7);
-                randomNickName = "user_" + uuid;
+                randomNickName = UUID.randomUUID().toString().substring(0, 5);
             }
 
             Member member = Member.builder()