diff --git a/deno_dist/client/types.ts b/deno_dist/client/types.ts
index 13b5e4fb9..d5e25a262 100644
--- a/deno_dist/client/types.ts
+++ b/deno_dist/client/types.ts
@@ -2,9 +2,11 @@ import type { Hono } from '../hono.ts'
 import type { Schema } from '../types.ts'
 import type { RemoveBlankRecord } from '../utils/types.ts'
 
+type HonoRequest = typeof Hono.prototype['request']
+
 export type ClientRequestOptions = {
   headers?: Record<string, string>
-  fetch?: typeof fetch
+  fetch?: typeof fetch | HonoRequest
 }
 
 type ClientRequest<S extends Schema> = {
diff --git a/deno_dist/hono-base.ts b/deno_dist/hono-base.ts
index a21059f9e..61996784f 100644
--- a/deno_dist/hono-base.ts
+++ b/deno_dist/hono-base.ts
@@ -375,7 +375,7 @@ class Hono<
   }
 
   request = (
-    input: Request | string | URL,
+    input: RequestInfo | URL,
     requestInit?: RequestInit,
     Env?: E['Bindings'] | {},
     executionCtx?: ExecutionContext
diff --git a/src/client/client.test.ts b/src/client/client.test.ts
index 07d87d243..0880cbb08 100644
--- a/src/client/client.test.ts
+++ b/src/client/client.test.ts
@@ -470,3 +470,13 @@ describe('Use custom fetch method', () => {
     expect(res).toEqual(returnValue)
   })
 })
+
+describe('Use custom fetch (app.request) method', () => {
+  it('Should return Response from app request method', async () => {
+    const app = new Hono().get('/search', (c) => c.jsonT({ ok: true }))
+    type AppType = typeof app
+    const client = hc<AppType>('', { fetch: app.request })
+    const res = await client.search.$get()
+    expect(res.ok).toBe(true)
+  })
+})
diff --git a/src/client/types.ts b/src/client/types.ts
index 34fb7df2e..83f4e3061 100644
--- a/src/client/types.ts
+++ b/src/client/types.ts
@@ -2,9 +2,11 @@ import type { Hono } from '../hono'
 import type { Schema } from '../types'
 import type { RemoveBlankRecord } from '../utils/types'
 
+type HonoRequest = typeof Hono.prototype['request']
+
 export type ClientRequestOptions = {
   headers?: Record<string, string>
-  fetch?: typeof fetch
+  fetch?: typeof fetch | HonoRequest
 }
 
 type ClientRequest<S extends Schema> = {
diff --git a/src/hono-base.ts b/src/hono-base.ts
index 359882bfa..64dd9d875 100644
--- a/src/hono-base.ts
+++ b/src/hono-base.ts
@@ -375,7 +375,7 @@ class Hono<
   }
 
   request = (
-    input: Request | string | URL,
+    input: RequestInfo | URL,
     requestInit?: RequestInit,
     Env?: E['Bindings'] | {},
     executionCtx?: ExecutionContext