diff --git a/.changeset/heavy-bugs-perform.md b/.changeset/heavy-bugs-perform.md
new file mode 100644
index 000000000..b8ec5d0a7
--- /dev/null
+++ b/.changeset/heavy-bugs-perform.md
@@ -0,0 +1,5 @@
+---
+'@hono/cloudflare-access': minor
+---
+
+Handle Access organization does not exist and Access not available cases
diff --git a/packages/cloudflare-access/src/index.test.ts b/packages/cloudflare-access/src/index.test.ts
index 851e6adc7..353b68181 100644
--- a/packages/cloudflare-access/src/index.test.ts
+++ b/packages/cloudflare-access/src/index.test.ts
@@ -116,14 +116,17 @@ describe('Cloudflare Access middleware', async () => {
   const keyPair2 = await generateJWTKeyPair();
   const keyPair3 = await generateJWTKeyPair();
 
-  vi.stubGlobal('fetch', async () => {
-    return Response.json({
-      keys: [
-        publicKeyToJWK(keyPair1.publicKey),
-        publicKeyToJWK(keyPair2.publicKey),
-      ],
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.stubGlobal('fetch', async () => {
+      return Response.json({
+        keys: [
+          publicKeyToJWK(keyPair1.publicKey),
+          publicKeyToJWK(keyPair2.publicKey),
+        ],
+      })
     })
-  })
+  });
 
   const app = new Hono()
 
@@ -131,6 +134,12 @@ describe('Cloudflare Access middleware', async () => {
   app.get('/hello-behind-access', (c) => c.text('foo'))
   app.get('/access-payload', (c) => c.json(c.get('accessPayload')))
 
+  app.onError((err, c) => {
+    return c.json({
+      err: err.toString(),
+    }, 500)
+  })
+
   it('Should be throw Missing bearer token when nothing is sent', async () => {
     const res = await app.request('http://localhost/hello-behind-access')
     expect(res).not.toBeNull()
@@ -248,4 +257,38 @@ describe('Cloudflare Access middleware', async () => {
       "exp":expect.any(Number)
     })
   })
+
+  it('Should throw an error, if the access organization does not exist', async () => {
+    vi.stubGlobal('fetch', async () => {
+      return Response.json({success: false}, {status: 404})
+    })
+
+    const res = await app.request('http://localhost/hello-behind-access', {
+      headers: {
+        'cf-access-jwt-assertion': 'asdads'
+      }
+    })
+    expect(res).not.toBeNull()
+    expect(res.status).toBe(500)
+    expect(await res.json()).toEqual({
+      "err":"Error: @hono/cloudflare-access: The Access Organization 'my-cool-team-name' does not exist!"
+    })
+  })
+
+  it('Should throw an error, if the access certs url is unavailable', async () => {
+    vi.stubGlobal('fetch', async () => {
+      return Response.json({success: false}, {status: 500})
+    })
+
+    const res = await app.request('http://localhost/hello-behind-access', {
+      headers: {
+        'cf-access-jwt-assertion': 'asdads'
+      }
+    })
+    expect(res).not.toBeNull()
+    expect(res.status).toBe(500)
+    expect(await res.json()).toEqual({
+      "err":"Error: @hono/cloudflare-access: Received unexpected HTTP code 500 from Cloudflare Access!"
+    })
+  })
 })
diff --git a/packages/cloudflare-access/src/index.ts b/packages/cloudflare-access/src/index.ts
index cd69ff3ce..5b01e1c82 100644
--- a/packages/cloudflare-access/src/index.ts
+++ b/packages/cloudflare-access/src/index.ts
@@ -89,6 +89,14 @@ async function getPublicKeys(accessTeamName: string) {
     },
   })
 
+  if (!result.ok) {
+    if (result.status === 404) {
+      throw new Error(`@hono/cloudflare-access: The Access Organization '${accessTeamName}' does not exist!`)
+    }
+
+    throw new Error(`@hono/cloudflare-access: Received unexpected HTTP code ${result.status} from Cloudflare Access!`)
+  }
+
   const data: any = await result.json()
 
   // Because we keep CryptoKey's in memory between requests, we need to make sure they are refreshed once in a while