diff --git a/backend/app/Http/Controllers/Api/ChildrenController.php b/backend/app/Http/Controllers/Api/ChildrenController.php
index be21046f..03f5d927 100644
--- a/backend/app/Http/Controllers/Api/ChildrenController.php
+++ b/backend/app/Http/Controllers/Api/ChildrenController.php
@@ -96,7 +96,13 @@ class ChildrenController extends Controller {
 
     public function checkRegisterMain (Request $r) {
         // トークンの確認
-        if (null === ($get = TelActivation::select('tel')->where('token', $r->token)->first())) {
+        if (null === ($get = TelActivation::select('tel', 'ttl')->where('token', $r->token)->first())) {
+            return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
+        }
+
+        // トークンの有効期限が切れた場合
+        if (time() > strtotime($get->ttl)) {
+            TelActivation::where('token', $r->token)->delete();
             return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
         }
 
diff --git a/backend/app/Http/Controllers/Api/FathersController.php b/backend/app/Http/Controllers/Api/FathersController.php
index a446d388..7d3d037b 100644
--- a/backend/app/Http/Controllers/Api/FathersController.php
+++ b/backend/app/Http/Controllers/Api/FathersController.php
@@ -142,7 +142,13 @@ class FathersController extends Controller {
 
     public function checkRegisterMain (Request $r) {
         // トークンの確認
-        if (null === ($get = EmailActivation::where('token', $r->token)->first())) {
+        if (null === ($get = EmailActivation::select('ttl')where('token', $r->token)->first())) {
+            return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
+        }
+
+        // トークンの有効期限が切れた場合
+        if (time() > strtotime($get->ttl)) {
+            EmailActivation::where('token', $r->token)->delete();
             return ['status_code' => 400, 'error_messages' => ['不正な登録トークン。']];
         }