diff --git a/supervisor/html/index.html b/supervisor/html/index.html
index 8c9b808..29ece15 100755
--- a/supervisor/html/index.html
+++ b/supervisor/html/index.html
@@ -1011,11 +1011,12 @@
                                 `<img src="/media/compressed/${checkin.photos}" class="h-20 w-20 object-cover rounded" onclick="showLargeImage(this.src)">` : ''}
                         </td>
                         <td class="px-2 py-3">
-                            ${checkin.cp_number===-1 || checkin.image_address===null ? "" : 
+                            ${checkin.image_address ? 
                                 `<img src="${checkin.image_address}" 
                                     class="h-20 w-20 object-cover rounded" 
                                     onclick="showLargeImage(this.src)"
-                                    onerror="this.parentElement.innerHTML=''">`}
+                                    onerror="this.parentElement.innerHTML='画像読込エラー'">`
+                                : ''}
                         </td>
                         <td class="px-2 py-3 ${bgColor}">
                             <div class="font-bold">${checkin.sub_loc_id}</div>