diff --git a/deno_dist/middleware/etag/index.ts b/deno_dist/middleware/etag/index.ts
index 00702981..e618715f 100644
--- a/deno_dist/middleware/etag/index.ts
+++ b/deno_dist/middleware/etag/index.ts
@@ -1,6 +1,5 @@
 import type { Context } from '../../context.ts'
 import type { Next } from '../../hono.ts'
-import { parseBody } from '../../utils/body.ts'
 import { sha1 } from '../../utils/crypto.ts'
 
 type ETagOptions = {
@@ -15,8 +14,7 @@ export const etag = (options: ETagOptions = { weak: false }) => {
 
     const res = c.res as Response
     const clone = res.clone()
-    const body = await parseBody(res)
-    const hash = await sha1(body)
+    const hash = await sha1(res.body || '')
 
     const etag = options.weak ? `W/"${hash}"` : `"${hash}"`
 
diff --git a/deno_dist/utils/crypto.ts b/deno_dist/utils/crypto.ts
index 506eac9a..1066f897 100644
--- a/deno_dist/utils/crypto.ts
+++ b/deno_dist/utils/crypto.ts
@@ -3,7 +3,7 @@ type Algorithm = {
   alias: string
 }
 
-type Data = string | boolean | number | object | ArrayBufferView | ArrayBuffer
+type Data = string | boolean | number | object | ArrayBufferView | ArrayBuffer | ReadableStream
 
 export const sha256 = async (data: Data) => {
   const algorithm: Algorithm = { name: 'SHA-256', alias: 'sha256' }
@@ -26,6 +26,15 @@ export const md5 = async (data: Data) => {
 export const createHash = async (data: Data, algorithm: Algorithm): Promise<string | null> => {
   let sourceBuffer: ArrayBufferView | ArrayBuffer
 
+  if (data instanceof ReadableStream) {
+    let body = ''
+    const reader = data.getReader()
+    await reader?.read().then(async (chuck) => {
+      const value = await createHash(chuck.value || '', algorithm)
+      body += value
+    })
+    return body
+  }
   if (ArrayBuffer.isView(data) || data instanceof ArrayBuffer) {
     sourceBuffer = data
   } else {
diff --git a/src/middleware/etag/index.ts b/src/middleware/etag/index.ts
index 9945ca96..02a6dea9 100644
--- a/src/middleware/etag/index.ts
+++ b/src/middleware/etag/index.ts
@@ -1,6 +1,5 @@
 import type { Context } from '../../context'
 import type { Next } from '../../hono'
-import { parseBody } from '../../utils/body'
 import { sha1 } from '../../utils/crypto'
 
 type ETagOptions = {
@@ -15,8 +14,7 @@ export const etag = (options: ETagOptions = { weak: false }) => {
 
     const res = c.res as Response
     const clone = res.clone()
-    const body = await parseBody(res)
-    const hash = await sha1(body)
+    const hash = await sha1(res.body || '')
 
     const etag = options.weak ? `W/"${hash}"` : `"${hash}"`
 
diff --git a/src/utils/crypto.ts b/src/utils/crypto.ts
index 506eac9a..1066f897 100644
--- a/src/utils/crypto.ts
+++ b/src/utils/crypto.ts
@@ -3,7 +3,7 @@ type Algorithm = {
   alias: string
 }
 
-type Data = string | boolean | number | object | ArrayBufferView | ArrayBuffer
+type Data = string | boolean | number | object | ArrayBufferView | ArrayBuffer | ReadableStream
 
 export const sha256 = async (data: Data) => {
   const algorithm: Algorithm = { name: 'SHA-256', alias: 'sha256' }
@@ -26,6 +26,15 @@ export const md5 = async (data: Data) => {
 export const createHash = async (data: Data, algorithm: Algorithm): Promise<string | null> => {
   let sourceBuffer: ArrayBufferView | ArrayBuffer
 
+  if (data instanceof ReadableStream) {
+    let body = ''
+    const reader = data.getReader()
+    await reader?.read().then(async (chuck) => {
+      const value = await createHash(chuck.value || '', algorithm)
+      body += value
+    })
+    return body
+  }
   if (ArrayBuffer.isView(data) || data instanceof ArrayBuffer) {
     sourceBuffer = data
   } else {