diff --git a/src/pages/app/MailOrder.tsx b/src/pages/app/MailOrder.tsx
index 3780f76..ce49346 100644
--- a/src/pages/app/MailOrder.tsx
+++ b/src/pages/app/MailOrder.tsx
@@ -111,10 +111,6 @@ export default function MailOrder() {
     return null;
   }
 
-  if (!canMailOrder) {
-    return null;
-  }
-
   return (
     <>
       <Box sx={{ p: 3, pt: 5, mx: "auto", maxWidth: 500 }} textAlign="center">
@@ -182,7 +178,11 @@ export default function MailOrder() {
                   >
                     戻る
                   </Button>
-                  <Button variant="contained" onClick={handleConfirm}>
+                  <Button
+                    variant="contained"
+                    onClick={handleConfirm}
+                    disabled={!canMailOrder}
+                  >
                     確定
                   </Button>
                 </Stack>