diff --git a/.changeset/five-zoos-look.md b/.changeset/five-zoos-look.md
new file mode 100644
index 000000000000..f882dee9bcf7
--- /dev/null
+++ b/.changeset/five-zoos-look.md
@@ -0,0 +1,5 @@
+---
+'@astrojs/cloudflare': patch
+---
+
+fix custom 404 pages not rendering
diff --git a/packages/integrations/cloudflare/src/server.ts b/packages/integrations/cloudflare/src/server.ts
index 6a76c06ff48c..032146691ea3 100644
--- a/packages/integrations/cloudflare/src/server.ts
+++ b/packages/integrations/cloudflare/src/server.ts
@@ -24,6 +24,11 @@ export function createExports(manifest: SSRManifest) {
 		}
 
 		// 404
+		const _404Request = new Request(`${origin}/404`, request);
+		if (app.match(_404Request)) {
+			return app.render(_404Request);
+		}
+
 		return new Response(null, {
 			status: 404,
 			statusText: 'Not found',