2FA セットアップガイド

X (Twitter) アカウントで 2FA を有効にする方法

2026年6月5日を更新しました

2 要素認証 (2FA) は、パスワードが漏洩した場合でも、X (Twitter) アカウントを保護します。 iPhone、iPad、または Mac で Authenticator App を使用して X (Twitter) 検証コードを生成するには、以下の手順に従ってください。

Download Authenticator App
Download Authenticator App from the App Store on your iPhone, iPad or Mac. It's free and no sign-up is required.
Open X security settings
Go to “Settings and privacy” → “Security and account access” → “Security”.
Choose the authentication app method
Click “Two-factor authentication”, tick “Authentication app”, confirm your password and X will display a QR code.
Scan the QR code with Authenticator App
Open Authenticator App, tap the + button and scan the QR code shown by X (Twitter). If you can't scan it, choose the manual option on X (Twitter) and type the setup key into the app instead.
Enter the 6-digit verification code
Type the 6-digit code from Authenticator App back into X (Twitter) to confirm the setup. The code refreshes every 30 seconds.
Save your backup codes
If X (Twitter) offers backup or recovery codes, download or write them down and store them somewhere safe. They let you regain access if you ever lose your device.