diff --git a/app/Http/Controllers/RegularContractCreateController.php b/app/Http/Controllers/RegularContractCreateController.php
index d2f9100..5ee9b13 100644
--- a/app/Http/Controllers/RegularContractCreateController.php
+++ b/app/Http/Controllers/RegularContractCreateController.php
@@ -825,7 +825,7 @@ class RegularContractCreateController extends Controller
         ]);
 
         if ($validator->fails()) {
-            return back()
+            return redirect()->route('regular_contract.create_confirm_error', ['contract_id' => $contract_id])
                 ->withErrors($validator)
                 ->withInput();
         }
diff --git a/routes/web.php b/routes/web.php
index 9666548..ebf0752 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -125,6 +125,7 @@ Route::get('/regular-contract/upload_identity_success', [RegularContractCreateCo
 Route::get('/regular-contract/upload_identity_fail', [RegularContractCreateController::class, 'showUploadIdentityFail'])->name('regular_contract.upload_identity_fail');
 Route::get('regular_contract/create_confirm', [RegularContractCreateController::class, 'createConfirm'])->name('regular_contract.create_confirm');
 Route::post('/regular_contract/create_confirm_next/{contract_id}', [RegularContractCreateController::class, 'createConfirmNext'])->name('regular_contract.create_confirm_next');
+Route::get('/regular_contract/create_confirm_error/{contract_id}', [RegularContractCreateController::class, 'createConfirmNext'])->name('regular_contract.create_confirm_error');
 Route::post('/regular_contract/create_select_period', [RegularContractCreateController::class, 'selectPeriod'])->name('regular_contract.create_select_period');
 
 // 定期契約更新