diff --git a/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java b/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java
index 5f259a5..fa51c5a 100644
--- a/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java
+++ b/src/main/java/org/ntlab/nemophila/resources/accounts/AccountPostsRest.java
@@ -40,9 +40,15 @@
         if (account != null && account.getToken().equals(token)) {
             Post post = account.createPost(shop, rate, genre, comme, img1, img2, img3);
             return post.getId();
+        } else if (!account.getToken().equals(token)){
+            var response = Response.status(Response.Status.NO_CONTENT);
+            response.status(401).entity("tokenの認証に失敗");
+            throw new WebApplicationException(response.build());
+        } else {
+            var response = Response.status(Response.Status.NO_CONTENT);
+            response.status(404).entity("不正なID");
+            throw new WebApplicationException(response.build());
         }
-
-        return null;
     }
 
     // 「/{uid}/posts」のGETメソッド