iOSからGmailに連絡先を同期する方法：完全ガイド

iOSからGmailに連絡先を同期させたいけど、技術的なことで頭がいっぱい？ご心配なく！どのアイコンに注目すればいいかを知っていればいいだけです。ここでは、タップ・バイ・タップのガイドをご紹介します。

Why Do You Need to Sync Contacts from iOS to Google Workspace?

In today’s connected world, convenience is key, and syncing your contacts across all your devices—whether personal or work-related—is a huge time-saver. Many small and medium-sized businesses rely on Google Workspace for both personal and professional communication, making it essential to sync iOS contacts with Gmail.

Cross-platform, device-independent contact syncing is a modern convenience that most of us quickly come to depend on.

We’ve all been there: scrambling to find someone’s contact information, searching through multiple apps on different devices, and still not having any luck. Or maybe you use an iPhone for personal calls but rely on an Android device for work. Without contact syncing, constantly switching between devices can become frustrating.

Another common scenario is when iPhone users switch to Android, either for personal use or because of work requirements. In these cases, syncing your Google contacts with iOS can make the transition much smoother.

Whatever your reason, backing up your iOS contacts to Google is a smart move that can save you a lot of hassle in the long run.

iOSからGmailに連絡先を同期する方法

To sync your Google contacts with iOS, just follow these steps:

1. を開く。 セッティング app on your iPhone.
   
2. タップ 連絡先.
   
3. 選択 アカウント.
   
4. タップ アカウントの追加 or choose an existing account (in this case, select your Google Workspace account).
   
   
5. 選ぶ グーグル from the list of email providers.
   
6. Sign in to your Gmail account, entering your email and password, and grant the necessary permissions.
7. Toggle 連絡先 to the “on” position to sync your contacts.
8. タップ セーブ in the upper-right corner.

注意：この時点で、以下のいずれかを選択するよう警告が表示される場合があります：

• iPhoneに保存 (to retain existing local contacts)
• 削除 (to remove existing contacts).

iPhoneで新しく追加した連絡先のデフォルトをGmailアカウントにする

Once you’ve synced your iPhone contacts with Google Contacts, you can also set Gmail as the default account for new contacts:

• を開く。 設定 app.
  
• タップ Contacts. 
  
• 選択 デフォルトアカウント.
  
• Choose a Gmail account.
  

Gmailを通してiOSからAndroidへ連絡先を転送する

Once you’ve synced your iOS contacts with Gmail, syncing them to your Android device is easy—just follow our guide for syncing Android contacts with your Gmail account.

Unlike a backup, syncing allows for continuous two-way data exchange. Once you’ve set up syncing, any new contact added to one device will automatically appear on the other.

GoogleドライブでiOSの連絡先をバックアップ

iOSの連絡先をGoogleドライブでバックアップすることもできます。以下の手順でミッションを完了させましょう：

1. ダウンロード Google Drive to your iPhone.
2. Log in with your Gmail account.
3. オープン Google Drive and tap the three-line menu icon.
4. 選択 設定.
5. タップ バックアップ.
6. Toggle 連絡先.
7. Go back to the main screen and tap バックアップ開始 in the bottom-right corner.

All your current iPhone contacts will now be backed up to Google Drive.

Note: This is a one-time backup. Any future changes to your iPhone contacts won’t be reflected in Google Drive unless you manually back them up again.

Backing up your contacts is especially useful for added security—such as when you’re traveling to places where your phone might be at higher risk of being lost or stolen.

Tips for Fixing Google Contacts Syncing Issues on iOS Devices

If you run into problems syncing your iOS contacts with Gmail, try one of these solutions:

iPhoneを再起動する

A simple reboot can often fix many technical issues. For newer iPhone models, press and hold either of the volume buttons or the side button until the slider appears. For older models, check Apple’s official support page for instructions.

その他のiPhoneモデルの詳細は アップルのカスタマーサポート 公式サイト［最新モデルは以下のアルゴリズムを使用］

Googleアカウントの削除と再追加

You can also try removing and re-adding your Google account. Go to 連絡先, select グループ, and then untick and retick your Gmail account. If that doesn’t work, remove and re-add your Google account in the 設定 app.

連絡先同期の無効化と再有効化

Another method you could try is to fully break the link between your smartphone and Google Contacts by disabling and re-enabling your Contacts sync. Go to 設定 > 連絡先 > グループ, and toggle off syncing. Then, turn it back on to refresh the connection.

結論

Now that you know how to sync your iPhone contacts with a Google account, you can streamline your workflow and save time by keeping everything in sync across devices.

FAQ

How long does it take to sync iOS contacts?

It usually takes just a few minutes to sync iOS, contacts with Google, depending on your internet connection and the number of contacts you have. For most users, it should take no more than 3-5 minutes.

How often do you need to sync iOS contacts?

Once you’ve synced your iPhone with Gmail, the contacts will stay synchronized. This means that new contacts added on either device will automatically update across both.

iOSの連絡先がGmailと同期しないのはなぜですか？

The most common reasons are incorrect sync setup, confusing syncing with backup, or issues signing in to your Google account. Make sure you’ve followed the steps carefully and are signed in properly.