diff --git a/backend/app/Http/Controllers/Api/ChildrenController.php b/backend/app/Http/Controllers/Api/ChildrenController.php
index 97447d2b..30ef6c4f 100644
--- a/backend/app/Http/Controllers/Api/ChildrenController.php
+++ b/backend/app/Http/Controllers/Api/ChildrenController.php
@@ -376,16 +376,24 @@ class ChildrenController extends Controller {
 
         $ext = explode('/', mime_content_type($r->image))[1];
         $filename = $this->uuidv4() . '.'.$ext;
+        $oldimg = null;
 
         try {
+            DB::beginTransaction();
+
             $image = base64_decode(substr($r->image, strpos($r->image, ',') + 1));
             Storage::disk('private')->put($filename, $image);
 
-            $update = [
-                'image' => '/files/'.$filename,
-            ];
-
-            Child::where('id', (int)$child_id)->update($update);
+            $child = Child::find((int)$child_id);
+            if (!is_null($child->image) && $child->image != '/assets/default/avatar.jpg') {
+                $oldimg = str_replace('/files/', '', $child->image);
+                if (!Storage::disk('private')->exists($oldimg)) {
+                    Log::warning($oldimg.'というパスは不正です。');
+                    $oldimg = null;
+                }
+            }
+            $child->image = '/files/'.$filename;
+            $child->save();
 
             $get = Child::where('id', (int)$child_id)->first();
             $login_user_datum = $get->toArray();
@@ -399,6 +407,10 @@ class ChildrenController extends Controller {
             return ['status_code' => 400, 'error_messages' => ['画像の更新に失敗しました。']];
         }
 
+        if (!is_null($oldimg)) {
+            Storage::disk('private')->delete($oldimg);
+        }
+
         // 成功
         return ['status_code' => 200, 'success_messages' => ['画像の更新に成功しました。']];
     }
diff --git a/backend/app/Http/Controllers/Api/FathersController.php b/backend/app/Http/Controllers/Api/FathersController.php
index e6b0957d..f22c3f02 100644
--- a/backend/app/Http/Controllers/Api/FathersController.php
+++ b/backend/app/Http/Controllers/Api/FathersController.php
@@ -325,8 +325,12 @@ class FathersController extends Controller {
             Storage::disk('private')->put($filename, $image);
 
             $father = Father::find((int)$father_id);
-            if (!is_null($father->image)) {
-                $oldimg = $father->image;
+            if (!is_null($father->image) && $father->image != '/assets/default/avatar.jpg') {
+                $oldimg = str_replace('/files/', '', $father->image);
+                if (!Storage::disk('private')->exists($oldimg)) {
+                    Log::warning($oldimg.'というパスは不正です。');
+                    $oldimg = null;
+                }
             }
             $father->image = '/files/'.$filename;
             $father->save();
@@ -347,7 +351,7 @@ class FathersController extends Controller {
         }
 
         if (!is_null($oldimg)) {
-            $stor = Storage::disk('private')->delete($oldimg);
+            Storage::disk('private')->delete($oldimg);
         }
 
         // 親プロフィール画像のアップロードに成功