diff --git a/src/main/java/com/togedong/member/controller/dto/ChallengeResponse.java b/src/main/java/com/togedong/member/controller/dto/ChallengeResponse.java
index 4ca6a2f..335cf55 100644
--- a/src/main/java/com/togedong/member/controller/dto/ChallengeResponse.java
+++ b/src/main/java/com/togedong/member/controller/dto/ChallengeResponse.java
@@ -2,7 +2,7 @@
 
 import com.togedong.participant.ParticipantStatus;
 
-public record ChallengeResponse(String description, int participantCount, int progressPercent,
+public record ChallengeResponse(String challengeId, String description, int participantCount, int progressPercent,
                                 ParticipantStatus isParticipating
 ) {
 
diff --git a/src/main/java/com/togedong/member/service/DefaultMemberService.java b/src/main/java/com/togedong/member/service/DefaultMemberService.java
index cdbfd7a..905abd9 100644
--- a/src/main/java/com/togedong/member/service/DefaultMemberService.java
+++ b/src/main/java/com/togedong/member/service/DefaultMemberService.java
@@ -33,6 +33,8 @@
 @Slf4j
 public class DefaultMemberService implements MemberService {
 
+    private static final int NOT_PARTICIPANT_COUNT = 0;
+
     private final MemberRepository userRepository;
     private final ParticipantService participantService;
     private final ChallengeService challengeService;
@@ -97,13 +99,15 @@ private ChallengeResponse includeMemberInfo(final Challenge challenge, final Mem
         log.info("participant count : " + participantCount);
 
         if (!participantService.alreadyParticipate(member, challenge)) {
-            return new ChallengeResponse(description, participantCount, 0,
+            return new ChallengeResponse(challenge.getId(), description, participantCount,
+                NOT_PARTICIPANT_COUNT,
                 NOT_PARTICIPANT);
         }
 
         int progressPercent = challenge.calculateProgressPercent(
             member.calculateRecordsSum(challenge.getExercise()));
-        return new ChallengeResponse(description, participantCount, progressPercent, PARTICIPANT);
+        return new ChallengeResponse(challenge.getId(), description, participantCount,
+            progressPercent, PARTICIPANT);
     }
 
     private Member findMemberByName(final String name) {