diff --git a/src/main/java/com/example/spot/domain/Post.java b/src/main/java/com/example/spot/domain/Post.java
index 4dacbf33..d3a254f3 100644
--- a/src/main/java/com/example/spot/domain/Post.java
+++ b/src/main/java/com/example/spot/domain/Post.java
@@ -67,7 +67,7 @@ public class Post extends BaseEntity {
     @JoinColumn(name = "member_id")
     private Member member;
 
-    public void edit(PostUpdateRequest request, List<String> images) {
+    public void edit(PostUpdateRequest request, List<String> images, String existingImage) {
         if (StringUtils.hasText(request.getTitle())) {
             this.title = request.getTitle();
         }
@@ -78,13 +78,25 @@ public void edit(PostUpdateRequest request, List<String> images) {
 
         this.isAnonymous = request.isAnonymous();
 
-        this.image = (images != null && !images.isEmpty() && StringUtils.hasText(images.get(0)))
-                ? images.get(0)
-                : null;
+        updateImage(images, existingImage);
 
         if (request.getType() != null) {
             this.board = request.getType();
         }
+
+        if (request.getType() != null) {
+            this.board = request.getType();
+        }
+    }
+
+    private void updateImage(List<String> images, String existingImage) {
+        if (StringUtils.hasText(existingImage)) {
+            this.image = existingImage;
+        } else if (images != null && !images.isEmpty() && StringUtils.hasText(images.get(0))) {
+            this.image = images.get(0);
+        } else {
+            this.image = null;
+        }
     }
 
 
diff --git a/src/main/java/com/example/spot/service/post/PostCommandServiceImpl.java b/src/main/java/com/example/spot/service/post/PostCommandServiceImpl.java
index 0bd3106b..f5c54bf2 100644
--- a/src/main/java/com/example/spot/service/post/PostCommandServiceImpl.java
+++ b/src/main/java/com/example/spot/service/post/PostCommandServiceImpl.java
@@ -140,7 +140,7 @@ public PostCreateResponse updatePost(Long memberId, Long postId, PostUpdateReque
         }
 
         // 게시글 수정
-        post.edit(postUpdateRequest, getImageUrls(postUpdateRequest.getImage()));
+        post.edit(postUpdateRequest, getImageUrls(postUpdateRequest.getImage()), postUpdateRequest.getExistingImage());
 
         // 수정된 게시글 정보 반환
         return PostCreateResponse.toDTO(post);
diff --git a/src/main/java/com/example/spot/web/controller/PostController.java b/src/main/java/com/example/spot/web/controller/PostController.java
index 0ecceb7a..1a2e5416 100644
--- a/src/main/java/com/example/spot/web/controller/PostController.java
+++ b/src/main/java/com/example/spot/web/controller/PostController.java
@@ -138,7 +138,8 @@ public ApiResponse<PostAnnouncementResponse> getPostAnnouncement() {
     @Tag(name = "게시판", description = "게시판 관련 API")
     @Operation(
             summary = "[게시판] 게시글 수정 API",
-            description = "게시글 Id를 받아 게시글을 수정합니다.",
+            description = "게시글 Id를 받아 게시글을 수정합니다. existingImage는 기존 이미지 URL입니다. 수정할 이미지가 없을 경우 null로 보내주세요. 요청 시, 요청 타입은 Multipart/form-data로 보내야 합니다."
+                    + "\n" + "existingImage와 image 둘 중 하나만 보내주세요. 둘 다 보내면 기존 이미지로 덮어씌워집니다.",
             security = @SecurityRequirement(name = "accessToken")
     )
     @PatchMapping(value = "/{postId}", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
diff --git a/src/main/java/com/example/spot/web/dto/post/PostUpdateRequest.java b/src/main/java/com/example/spot/web/dto/post/PostUpdateRequest.java
index dc46f189..3449d3cd 100644
--- a/src/main/java/com/example/spot/web/dto/post/PostUpdateRequest.java
+++ b/src/main/java/com/example/spot/web/dto/post/PostUpdateRequest.java
@@ -37,6 +37,8 @@ public class PostUpdateRequest {
 
     private MultipartFile image;
 
+    private String existingImage;
+
     public Board getType() {
         return Board.findByValue(type);
     }