diff --git a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
index 28e2b7b6e2a7..e528ebc22d43 100644
--- a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
+++ b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
@@ -1114,6 +1114,25 @@ public function validateRegex($attribute, $value, $parameters)
         return preg_match($parameters[0], $value) > 0;
     }
 
+    /**
+     * Validate that an attribute does not pass a regular expression check.
+     *
+     * @param  string  $attribute
+     * @param  mixed   $value
+     * @param  array   $parameters
+     * @return bool
+     */
+    public function validateNotRegex($attribute, $value, $parameters)
+    {
+        if (! is_string($value) && ! is_numeric($value)) {
+            return false;
+        }
+
+        $this->requireParameterCount(1, $parameters, 'not_regex');
+
+        return preg_match($parameters[0], $value) < 1;
+    }
+
     /**
      * Validate that a required attribute exists.
      *
diff --git a/src/Illuminate/Validation/ValidationRuleParser.php b/src/Illuminate/Validation/ValidationRuleParser.php
index 43a28db989d8..3af36ce8985e 100644
--- a/src/Illuminate/Validation/ValidationRuleParser.php
+++ b/src/Illuminate/Validation/ValidationRuleParser.php
@@ -248,7 +248,9 @@ protected static function parseStringRule($rules)
      */
     protected static function parseParameters($rule, $parameter)
     {
-        if (strtolower($rule) == 'regex') {
+        $rule = strtolower($rule);
+
+        if ($rule === 'regex' || $rule === 'notregex') {
             return [$parameter];
         }
 
diff --git a/tests/Validation/ValidationValidatorTest.php b/tests/Validation/ValidationValidatorTest.php
index b0ee1f2e6454..bc89a7a6743a 100755
--- a/tests/Validation/ValidationValidatorTest.php
+++ b/tests/Validation/ValidationValidatorTest.php
@@ -2330,19 +2330,34 @@ public function testValidateTimezone()
     public function testValidateRegex()
     {
         $trans = $this->getIlluminateArrayTranslator();
-        $v = new Validator($trans, ['x' => 'asdasdf'], ['x' => 'Regex:/^([a-z])+$/i']);
+        $v = new Validator($trans, ['x' => 'asdasdf'], ['x' => 'Regex:/^[a-z]+$/i']);
         $this->assertTrue($v->passes());
 
-        $v = new Validator($trans, ['x' => 'aasd234fsd1'], ['x' => 'Regex:/^([a-z])+$/i']);
+        $v = new Validator($trans, ['x' => 'aasd234fsd1'], ['x' => 'Regex:/^[a-z]+$/i']);
         $this->assertFalse($v->passes());
 
+        // Ensure commas are not interpreted as parameter separators
         $v = new Validator($trans, ['x' => 'a,b'], ['x' => 'Regex:/^a,b$/i']);
         $this->assertTrue($v->passes());
 
         $v = new Validator($trans, ['x' => '12'], ['x' => 'Regex:/^12$/i']);
         $this->assertTrue($v->passes());
 
-        $v = new Validator($trans, ['x' => 123], ['x' => 'Regex:/^123$/i']);
+        $v = new Validator($trans, ['x' => 12], ['x' => 'Regex:/^12$/i']);
+        $this->assertTrue($v->passes());
+    }
+
+    public function testValidateNotRegex()
+    {
+        $trans = $this->getIlluminateArrayTranslator();
+        $v = new Validator($trans, ['x' => 'foo bar'], ['x' => 'NotRegex:/[xyz]/i']);
+        $this->assertTrue($v->passes());
+
+        $v = new Validator($trans, ['x' => 'foo xxx bar'], ['x' => 'NotRegex:/[xyz]/i']);
+        $this->assertFalse($v->passes());
+
+        // Ensure commas are not interpreted as parameter separators
+        $v = new Validator($trans, ['x' => 'foo bar'], ['x' => 'NotRegex:/x{3,}/i']);
         $this->assertTrue($v->passes());
     }