diff --git a/apps/web/middleware.ts b/apps/web/middleware.ts
new file mode 100644
index 0000000..8371a23
--- /dev/null
+++ b/apps/web/middleware.ts
@@ -0,0 +1,30 @@
+// apps/web/middleware.ts
+import { NextRequest, NextResponse } from 'next/server';
+
+export function middleware(req: NextRequest) {
+  const url = req.nextUrl.clone();
+  const host = req.headers.get('host') || '';
+  const pathname = req.nextUrl.pathname;
+
+  // 모바일 기기 감지
+  const userAgent = req.headers.get('user-agent') || '';
+  const isMobile =
+    /Mobi|Android|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(
+      userAgent,
+    );
+
+  if (host === 'm.rankit.run') {
+    return NextResponse.next();
+  }
+
+  if (isMobile) {
+    url.hostname = 'm.rankit.run';
+    return NextResponse.redirect(url);
+  }
+
+  return NextResponse.next();
+}
+
+export const config = {
+  matcher: '/:path*', // 모든 경로에 적용
+};