diff --git a/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupFacade.kt b/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupFacade.kt
index c080be2..dea6707 100644
--- a/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupFacade.kt
+++ b/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupFacade.kt
@@ -205,8 +205,17 @@ class GroupFacade(
     }
 
     suspend fun searchGroup(user: AuthUser, pageRequest: HeroPageRequest): Page<SearchGroupResponse> {
-        return groupService.findAll(pageRequest.toDefault())
-            .map { group -> SearchGroupResponse.from(group) }
+        val groups = groupService.findAll(pageRequest.toDefault())
+        
+        val groupUserByUid = groups.content.map { group -> group.id }
+            .run { groupUserService.findByUidAndGroupIdIn(user.uid, this) }
+            .associateBy { groupUser -> groupUser.groupId }
+
+        return groups
+            .map { group ->
+                val hasJoined = groupUserByUid[group.id] != null
+                SearchGroupResponse.from(group, hasJoined)
+            }
     }
 
     suspend fun deleteGroupUser(user: AuthUser, groupUserId: Long) {
diff --git a/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupUserService.kt b/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupUserService.kt
index ec1cfc3..2782293 100644
--- a/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupUserService.kt
+++ b/src/main/kotlin/com/hero/alignlab/domain/group/application/GroupUserService.kt
@@ -117,4 +117,10 @@ class GroupUserService(
             groupUserRepository.findAll()
         }
     }
+
+    suspend fun findByUidAndGroupIdIn(uid: Long, groupIds: List<Long>): List<GroupUser> {
+        return withContext(Dispatchers.IO) {
+            groupUserRepository.findByUidAndGroupIdIn(uid, groupIds)
+        }
+    }
 }
diff --git a/src/main/kotlin/com/hero/alignlab/domain/group/infrastructure/GroupUserRepository.kt b/src/main/kotlin/com/hero/alignlab/domain/group/infrastructure/GroupUserRepository.kt
index fb7c8a4..0d0598b 100644
--- a/src/main/kotlin/com/hero/alignlab/domain/group/infrastructure/GroupUserRepository.kt
+++ b/src/main/kotlin/com/hero/alignlab/domain/group/infrastructure/GroupUserRepository.kt
@@ -32,4 +32,6 @@ interface GroupUserRepository : JpaRepository<GroupUser, Long> {
     fun findByUid(uid: Long): GroupUser?
 
     fun countAllByGroupId(groupId: Long): Long
+
+    fun findByUidAndGroupIdIn(uid: Long, groupIds: List<Long>): List<GroupUser>
 }
diff --git a/src/main/kotlin/com/hero/alignlab/domain/group/model/response/SearchGroupResponse.kt b/src/main/kotlin/com/hero/alignlab/domain/group/model/response/SearchGroupResponse.kt
index 7d2d8d0..535577a 100644
--- a/src/main/kotlin/com/hero/alignlab/domain/group/model/response/SearchGroupResponse.kt
+++ b/src/main/kotlin/com/hero/alignlab/domain/group/model/response/SearchGroupResponse.kt
@@ -13,15 +13,18 @@ data class SearchGroupResponse(
     val name: String,
     /** 비밀 그룹 여부 */
     val isHidden: Boolean,
+    /** 그룹에 속해 있는지 여부 */
+    val hasJoined: Boolean,
 ) {
     companion object {
-        fun from(group: Group): SearchGroupResponse {
+        fun from(group: Group, hasJoined: Boolean): SearchGroupResponse {
             return SearchGroupResponse(
                 id = group.id,
                 userCount = group.userCount,
                 userCapacity = group.userCapacity,
                 name = group.name,
                 isHidden = group.isHidden,
+                hasJoined = hasJoined
             )
         }
     }