diff --git a/src/client.ts b/src/client.ts
index 5c926bf..78305e8 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -54,9 +54,9 @@ export async function get(config: Config, path: string): Promise<ObjectResponse
   return resp.result
 }
 
-export async function getAll(config: Config, path: string): Promise<ObjectsResponse | null> {
+export async function getChildren(config: Config, dirPath: string): Promise<ObjectsResponse | null> {
   const rest: rm.RestClient = new rm.RestClient('ke-client', config.baseurl)
-  const resp: rm.IRestResponse<ObjectsResponse> = await rest.get<ObjectsResponse>(path, requestOpts(config.token))
+  const resp: rm.IRestResponse<ObjectsResponse> = await rest.get<ObjectsResponse>(`${dirPath}.children`, requestOpts(config.token))
   if (resp.statusCode === 404) {
     return null
   }
diff --git a/src/commands/ls.ts b/src/commands/ls.ts
new file mode 100644
index 0000000..ad12c9b
--- /dev/null
+++ b/src/commands/ls.ts
@@ -0,0 +1,86 @@
+import {Args, Command, Flags} from '@oclif/core'
+import path from 'node:path'
+
+import * as KeClient from '../client.js'
+import {checkCwd, checkInsecure} from '../common.js'
+import Config from '../config.js'
+import {DIRECTORY_TYPE} from '../const.js'
+import {common as commonFlags} from '../flags.js'
+
+
+export default class Ls extends Command {
+  static override args = {
+    object: Args.string({description: 'file to read'}),
+  }
+
+  static override description = 'list information about the OBJECTs.'
+
+  static override examples = [
+    '<%= config.bin %> <%= command.id %>',
+  ]
+
+  static override flags = {
+    ...commonFlags,
+    // flag with a value (-c, --cwd=VALUE)
+    cwd: Flags.string({char: 'c', description: 'set current working directory to VALUE'}),
+    long: Flags.boolean({char: 'l', description: 'use a long listing format'}),
+  }
+
+  static strict = false
+
+  private conf!: Config
+
+  public async run(): Promise<void> {
+    const {argv, flags} = await this.parse(Ls)
+    this.conf = new Config(flags)
+    checkInsecure(flags.insecure)
+    const cwd = await checkCwd(this.conf, flags.cwd)
+
+    if (argv.length === 0) {
+      argv.push('.')
+    }
+
+    const withHeader = argv.length > 1
+    const results = await Promise.all(
+      argv.map((arg) => this.listObj(path.resolve(cwd, arg as string), withHeader, flags.long))
+    )
+    if (results.includes(false)) {
+      this.exit(1)
+    }
+  }
+
+  private _printObj(target: KeClient.ObjectResponse, indent: string, longFormat?: boolean) {
+    if (longFormat) {
+      const {name} = path.parse(target.abspath)
+      this.log(`${indent}${target.owner} ${target.updated} ${name}:${target.type_object}`)
+    } else {
+      const {name} = path.parse(target.abspath)
+      this.log(`${indent}${name}`)
+    }
+  }
+
+  private async listObj(targetPath: string, withHeader: boolean, longFormat?: boolean) {
+    const target = await KeClient.get(this.conf, targetPath)
+    if (target === null) {
+      this.warn(`failed to get '${targetPath}': no such object or directory`)
+      return false
+    }
+
+    if (target.type_object === DIRECTORY_TYPE) {
+      const resp = await KeClient.getChildren(this.conf, targetPath)
+      let indent = ''
+      if (withHeader) {
+        this.log(`${target.abspath}:`)
+        indent = '  '
+      }
+
+      for (const child of resp!.results) {
+        this._printObj(child, indent, longFormat)
+      }
+    } else {
+      this._printObj(target, '', longFormat)
+    }
+
+    return true
+  }
+}
diff --git a/src/commands/rmdir.ts b/src/commands/rmdir.ts
index 7fc40ff..2305fa6 100644
--- a/src/commands/rmdir.ts
+++ b/src/commands/rmdir.ts
@@ -66,7 +66,7 @@ export default class Rmdir extends Command {
     }
 
     // ディレクトリが空かどうかチェックする
-    const results = await KeClient.getAll(this.conf, `${targetDir}.children`)
+    const results = await KeClient.getChildren(this.conf, targetDir)
     if (results!.count > 0) {
       this.warn(`failed to remove directory: '${targetDir}' is not empty`)
       return
diff --git a/test/commands/ls.test.ts b/test/commands/ls.test.ts
new file mode 100644
index 0000000..f46e85e
--- /dev/null
+++ b/test/commands/ls.test.ts
@@ -0,0 +1,17 @@
+import {runCommand} from '@oclif/test'
+import {expect} from 'chai'
+
+describe('ls', () => {
+  before(async () => {
+    await runCommand('rm testdir --cwd /root -rfk')
+    await runCommand('mkdir testdir --cwd /root -k')
+  })
+  after(async () => {
+    await runCommand('rm testdir --cwd /root -rfk')
+  })
+
+  it('runs ls --help', async () => {
+    const {stdout} = await runCommand('ls --help')
+    expect(stdout).to.contain('USAGE')
+  })
+})