diff --git a/src/main/java/server/loop/domain/post/controller/PostController.java b/src/main/java/server/loop/domain/post/controller/PostController.java
index 00a1ac9..a19c240 100644
--- a/src/main/java/server/loop/domain/post/controller/PostController.java
+++ b/src/main/java/server/loop/domain/post/controller/PostController.java
@@ -49,7 +49,8 @@ public ResponseEntity<String> createPost(
     @GetMapping("/{postId}")
     public ResponseEntity<PostDetailResponseDto> getPost(
             @PathVariable Long postId,
-            @AuthenticationPrincipal @Nullable User currentUser) {
+            @AuthenticationPrincipal @Nullable User currentUser // 로그인 안 해도 null
+    ) {
         PostDetailResponseDto response = postService.getPost(postId, currentUser);
         return ResponseEntity.ok(response);
     }
diff --git a/src/main/java/server/loop/domain/post/entity/repository/PostRepository.java b/src/main/java/server/loop/domain/post/entity/repository/PostRepository.java
index 07ccee7..2153069 100644
--- a/src/main/java/server/loop/domain/post/entity/repository/PostRepository.java
+++ b/src/main/java/server/loop/domain/post/entity/repository/PostRepository.java
@@ -27,15 +27,14 @@ public interface PostRepository extends JpaRepository<Post, Long> {
     @Query("SELECT p FROM Post p WHERE p.category = :category ORDER BY p.createdAt DESC")
     Slice<Post> findAllActivePostsByCategory(@Param("category") Category category, Pageable pageable);
 
-    @Query("SELECT DISTINCT p FROM Post p " +
+    @Query("SELECT p FROM Post p " +
             "LEFT JOIN FETCH p.author " +
             "LEFT JOIN FETCH p.comments c " +
             "LEFT JOIN FETCH c.author " +
-            "LEFT JOIN FETCH c.children cc " +
-            "LEFT JOIN FETCH cc.author " +
             "WHERE p.id = :id AND p.isDeleted = false")
     Optional<Post> findActivePostWithCommentsById(@Param("id") Long id);
 
+
     @Query("SELECT p FROM Post p WHERE p.author = :author ORDER BY p.createdAt DESC")
     Slice<Post> findActivePostsByAuthor(@Param("author") User author, Pageable pageable);
 }
\ No newline at end of file
diff --git a/src/main/java/server/loop/global/security/JwtAuthenticationFilter.java b/src/main/java/server/loop/global/security/JwtAuthenticationFilter.java
index 4829609..b493a10 100644
--- a/src/main/java/server/loop/global/security/JwtAuthenticationFilter.java
+++ b/src/main/java/server/loop/global/security/JwtAuthenticationFilter.java
@@ -18,7 +18,7 @@
 public class JwtAuthenticationFilter extends OncePerRequestFilter {
 
     private final JwtTokenProvider jwtTokenProvider;
-    private final UserDetailsService userDetailsService; // CustomUserDetailsService 주입
+    private final UserDetailsService userDetailsService;
 
     @Override
     protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
@@ -27,7 +27,7 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
         String path = request.getRequestURI();
 
         // === 1. 광고 업로드/조회 API는 인증 없이 통과 ===
-        if (path.startsWith("/api/ads")) {  // /api/ads 또는 /api/ads/… 전부 허용
+        if (path.startsWith("/api/ads")) {
             filterChain.doFilter(request, response);
             return;
         }
@@ -35,23 +35,27 @@ protected void doFilterInternal(HttpServletRequest request, HttpServletResponse
         // 1. 요청 헤더에서 토큰 추출
         String token = resolveToken(request);
 
-        // 2. 토큰 유효성 검증
-        if (token != null && jwtTokenProvider.validateToken(token)) {
-            // 3. 토큰에서 사용자 정보(email) 가져오기
+        // === 2. 토큰이 없으면 (비로그인 요청) 그냥 통과 ===
+        if (token == null) {
+            filterChain.doFilter(request, response);
+            return;
+        }
+
+        // === 3. 토큰이 유효하면 인증 객체 생성 ===
+        if (jwtTokenProvider.validateToken(token)) {
             String email = jwtTokenProvider.getEmail(token);
-            // 4. UserDetailsService를 통해 UserDetails 객체 가져오기
             UserDetails userDetails = userDetailsService.loadUserByUsername(email);
-            // 5. Authentication 객체 생성 및 SecurityContext에 저장
+
             Authentication authentication =
                     new UsernamePasswordAuthenticationToken(userDetails, "", userDetails.getAuthorities());
             SecurityContextHolder.getContext().setAuthentication(authentication);
         }
 
-        // 다음 필터로 요청 전달
+        // 4. 다음 필터로 요청 전달
         filterChain.doFilter(request, response);
     }
 
-    // 요청 헤더에서 'Bearer ' 토큰을 추출하는 메소드
+    // 요청 헤더에서 'Bearer ' 토큰 추출
     private String resolveToken(HttpServletRequest request) {
         String bearerToken = request.getHeader("Authorization");
         if (bearerToken != null && bearerToken.startsWith("Bearer ")) {
@@ -59,4 +63,4 @@ private String resolveToken(HttpServletRequest request) {
         }
         return null;
     }
-}
\ No newline at end of file
+}