diff --git a/src/sammo/Validator.php b/src/sammo/Validator.php
index 5defd0cd..ab3b346a 100644
--- a/src/sammo/Validator.php
+++ b/src/sammo/Validator.php
@@ -3,4 +3,11 @@ namespace sammo;
 
 class Validator extends \Valitron\Validator{
     protected static $_lang = 'ko';
+
+    public function errorStr(){
+        $errors = array_values((array)$this->errors());
+        $errors = array_map(function($value){return join(', ', $value);}, $errors);
+        $errors = join(', ', $errors);
+        return $errors;
+    }
 }
\ No newline at end of file