diff --git a/backend/app/Http/Controllers/Api/ChildrenController.php b/backend/app/Http/Controllers/Api/ChildrenController.php
index 96699310..c3ba41e3 100644
--- a/backend/app/Http/Controllers/Api/ChildrenController.php
+++ b/backend/app/Http/Controllers/Api/ChildrenController.php
@@ -249,14 +249,14 @@ https://kikikan.jp/c-account/forgot-password/reset/'.$token;
         return ['status_code' => 200, 'params' => $result];
     }
 
-    public function listOfFather ($father_id) {
-        if (!isset($father_id)) {
+    public function listOfFather (Request $r) {
+        if (!isset($r->father_id)) {
             return ['status_code' => 400];
         }
         $result = [];
         $child_select = ['first_name', 'last_name', 'tel'];
 
-        if (null === ($list = FatherRelation::select('child_id')->where('father_id', (int)$father_id)->orderBy('created_at', 'desc')->get())) {
+        if (null === ($list = FatherRelation::select('child_id')->where('father_id', (int)$r->father_id)->orderBy('created_at', 'desc')->get())) {
             return ['status_code' => 400];
         }