diff --git a/src/pages/additional-service/key-in-payment/requeset-page.tsx b/src/pages/additional-service/key-in-payment/requeset-page.tsx
index 4ab392e..0518e73 100644
--- a/src/pages/additional-service/key-in-payment/requeset-page.tsx
+++ b/src/pages/additional-service/key-in-payment/requeset-page.tsx
@@ -123,6 +123,7 @@ export const KeyInPaymentRequestPage = () => {
             customerName.trim() !== '' &&
             expMon.trim() !== '' &&
             expYear.trim() !== '' &&
+            orderNumber.trim() !== '' &&
             isValidEmail(email) &&
             isValidPhoneNumber(phoneNumber) &&
             isValidCardNumber()
@@ -343,7 +344,7 @@ export const KeyInPaymentRequestPage = () => {
                                 </div>
 
                                 <div className="billing-row">
-                                    <div className="billing-label">주문번호</div>
+                                    <div className="billing-label">주문번호<span>*</span></div>
                                     <div className="billing-field">
                                         <input
                                             type="text"