diff --git a/shop/inicis/pro/inicis_pro.lib.php b/shop/inicis/pro/inicis_pro.lib.php
index 5b898008f..65b5ee239 100644
--- a/shop/inicis/pro/inicis_pro.lib.php
+++ b/shop/inicis/pro/inicis_pro.lib.php
@@ -117,6 +117,23 @@ if (!function_exists('inicis_pro_cut')) {
     }
 }
 
+if (!function_exists('inicis_pro_valid_email')) {
+    function inicis_pro_valid_email($email)
+    {
+        $email = trim((string) $email);
+        if ($email === '' || strlen($email) > 60)
+            return false;
+        if (!preg_match('/^[0-9A-Za-z._%+-]+@([0-9A-Za-z-]+\.)+[A-Za-z]{2,}$/', $email))
+            return false;
+
+        $tld = strtolower(substr(strrchr($email, '.'), 1));
+        if (in_array($tld, array('test', 'example', 'invalid', 'localhost', 'local')))
+            return false;
+
+        return true;
+    }
+}
+
 if (!function_exists('inicis_pro_clean_oid')) {
     function inicis_pro_clean_oid($oid)
     {
diff --git a/shop/inicis/pro/orderform.1.php b/shop/inicis/pro/orderform.1.php
index 1864f6dbb..4caae809d 100644
--- a/shop/inicis/pro/orderform.1.php
+++ b/shop/inicis/pro/orderform.1.php
@@ -12,11 +12,35 @@ if (G5_IS_MOBILE) {
 }
 ?>
 <script type="text/javascript">
+function inicis_pro_email_check()
+{
+    var field = jQuery('input[name=od_email], input[name=pp_email]').first();
+    if (!field.length)
+        return true;
+
+    var email = String(field.val() || '').replace(/^\s+|\s+$/g, '');
+    if (email === '')
+        return true;
+
+    if (email.length <= 60 && /^[0-9A-Za-z._%+-]+@([0-9A-Za-z-]+\.)+[A-Za-z]{2,}$/.test(email)) {
+        var tld = email.substring(email.lastIndexOf('.') + 1).toLowerCase();
+        if (tld !== 'test' && tld !== 'example' && tld !== 'invalid' && tld !== 'localhost' && tld !== 'local')
+            return true;
+    }
+
+    alert('이메일 주소가 올바르지 않습니다. 이메일 주소를 다시 확인해 주십시오.');
+    field.focus();
+    return false;
+}
+
 function inicis_pro_pay(oid, deviceType)
 {
     var requestData = null;
     var errorMessage = '';
 
+    if (!inicis_pro_email_check())
+        return false;
+
     jQuery.ajax({
         type: 'POST',
         url: g5_url + '/shop/inicis/pro/request.php',
diff --git a/shop/inicis/pro/request.php b/shop/inicis/pro/request.php
index 175af8227..3d8774fd5 100644
--- a/shop/inicis/pro/request.php
+++ b/shop/inicis/pro/request.php
@@ -72,9 +72,11 @@ $buyer_email = $is_personal ? (isset($order_data['pp_email']) ? $order_data['pp_
 $buyer_phone = $is_personal ? (isset($order_data['pp_hp']) ? $order_data['pp_hp'] : '') : (!empty($order_data['od_hp']) ? $order_data['od_hp'] : (isset($order_data['od_tel']) ? $order_data['od_tel'] : ''));
 
 $reserved = array(
-    'email' => inicis_pro_cut($buyer_email, 60),
     'phonenum' => preg_replace('/[^0-9]/', '', $buyer_phone)
 );
+// 이메일은 선택 항목이며, 형식이 확인되지 않으면 결제창 요청이 거부되므로 확인된 경우에만 전달한다.
+if (inicis_pro_valid_email($buyer_email))
+    $reserved['email'] = inicis_pro_cut($buyer_email, 60);
 if ($pay_type === 'CARD') {
     $reserved['quotabase'] = '01:02:03:04:05:06:07:08:09:10:11:12';
     if ($easypay_code !== '')