diff --git a/.changeset/deep-rivers-attend.md b/.changeset/deep-rivers-attend.md
new file mode 100644
index 00000000..88f4e9ee
--- /dev/null
+++ b/.changeset/deep-rivers-attend.md
@@ -0,0 +1,5 @@
+---
+'@hono/node-ws': patch
+---
+
+Fix missing code and reason on `CloseEvent`
diff --git a/packages/node-ws/src/index.test.ts b/packages/node-ws/src/index.test.ts
index e27792d6..c7d6d212 100644
--- a/packages/node-ws/src/index.test.ts
+++ b/packages/node-ws/src/index.test.ts
@@ -170,18 +170,21 @@ describe('WebSocket helper', () => {
   })
 
   it('CloseEvent should be executed without crash', async () => {
+    const testCode = 3001
+    const testReason = 'Test!'
     app.get(
       '/',
       upgradeWebSocket(() => ({
-        onClose() {
-          // doing some stuff here
+        onClose(event) {
+          expect(event.code).toBe(testCode)
+          expect(event.reason).toBe(testReason)
         },
       }))
     )
 
     const ws = new WebSocket('ws://localhost:3030/')
     await new Promise<void>((resolve) => ws.on('open', resolve))
-    ws.close()
+    ws.close(testCode, testReason)
   })
 
   it('Should be able to send and receive binary content with good length', async () => {
diff --git a/packages/node-ws/src/index.ts b/packages/node-ws/src/index.ts
index e86b432a..60aa14f0 100644
--- a/packages/node-ws/src/index.ts
+++ b/packages/node-ws/src/index.ts
@@ -126,8 +126,8 @@ export const createNodeWebSocket = (init: NodeWebSocketInit): NodeWebSocket => {
               )
             }
           })
-          ws.on('close', () => {
-            events.onClose?.(new CloseEvent('close'), ctx)
+          ws.on('close', (code, reason) => {
+            events.onClose?.(new CloseEvent('close', { code, reason: reason.toString() }), ctx)
           })
           ws.on('error', (error) => {
             events.onError?.(