diff --git a/src/main/java/com/moabam/api/application/member/MemberService.java b/src/main/java/com/moabam/api/application/member/MemberService.java
index 148fb592..ce4ca41a 100644
--- a/src/main/java/com/moabam/api/application/member/MemberService.java
+++ b/src/main/java/com/moabam/api/application/member/MemberService.java
@@ -27,8 +27,8 @@
 import com.moabam.global.error.exception.BadRequestException;
 import com.moabam.global.error.exception.ConflictException;
 import com.moabam.global.error.exception.NotFoundException;
-import com.moabam.global.error.model.ErrorMessage;
 
+import io.micrometer.common.util.StringUtils;
 import lombok.RequiredArgsConstructor;
 
 @Service
@@ -100,8 +100,8 @@ public void modifyInfo(AuthMember authMember, ModifyMemberRequest modifyMemberRe
 	}
 
 	private void validateNickname(String nickname) {
-		if (Objects.nonNull(nickname) && memberRepository.existsByNickname(nickname)) {
-			throw new ConflictException(ErrorMessage.CONFLICT_NICKNAME);
+		if (StringUtils.isEmpty(nickname) && memberRepository.existsByNickname(nickname)) {
+			throw new ConflictException(NICKNAME_CONFLICT);
 		}
 	}
 
diff --git a/src/main/java/com/moabam/global/error/model/ErrorMessage.java b/src/main/java/com/moabam/global/error/model/ErrorMessage.java
index becce7fe..3cfa68f2 100644
--- a/src/main/java/com/moabam/global/error/model/ErrorMessage.java
+++ b/src/main/java/com/moabam/global/error/model/ErrorMessage.java
@@ -35,7 +35,7 @@ public enum ErrorMessage {
 	MEMBER_NOT_FOUND_BY_MANAGER_OR_NULL("방의 매니저거나 회원이 존재하지 않습니다."),
 	MEMBER_ROOM_EXCEED("참여할 수 있는 방의 개수가 모두 찼습니다."),
 	UNLINK_REQUEST_FAIL_ROLLBACK_SUCCESS("카카오 연결 요청 실패로 Rollback하였습니다."),
-	CONFLICT_NICKNAME("이미 존재하는 닉네임입니다."),
+	NICKNAME_CONFLICT("이미 존재하는 닉네임입니다."),
 
 	INVALID_DEFAULT_SKIN_SIZE("기본 스킨은 2개여야 합니다. 관리자에게 문의하세요"),