You can log in to LINE OA in two places: the LINE Official Account Manager website on a computer, and the LINE Official Account app on a phone. Both use the same login, which LINE calls a Business ID. This article covers how to log in and what to do when you can't.

What is a Business ID

A Business ID is one login for LINE's services for businesses. There are two ways to log in with it:

LINE account: the email address and password registered in your LINE app
Business account: an email address and password you set up separately for business

Always pick the same way you used to sign up. If you created the LINE OA with your LINE account but log in with a business account, you may not see your shop's LINE OA. Accounts moved from LINE@ log in with Log in with LINE account, using the same email and password as LINE@.

Log in to LINE OA on a computer

Open Chrome and go to manager.line.biz
Choose Log in with LINE account or Log in with business account, then enter the email and password
If you log in with your LINE account, you get a 4-digit code: enter it in the LINE app on the phone that uses that account
Pick the LINE OA you want to manage

The website works on Windows and Mac with the latest Chrome, needs JavaScript turned on, and does not support Internet Explorer. For what to do after you log in, read LINE OA on a computer: how to use LINE Official Account Manager

Log in to the LINE Official Account app

Install the LINE Official Account app on your phone
If you choose Log in with LINE app, the app logs you in with the LINE account installed on the same phone
For a business account, choose Log in with Email, then enter the email and password

The app runs on Android 10 or later, iOS 16 or later and iPadOS 14 or later, but not on Android tablets.

Where to enter the 4-digit code

Logging in to LINE Official Account Manager always needs this check. The screen for the code opens in the LINE app that uses the email and password you logged in with, not in the LINE Official Account app. If you don't see it, open the LINE app on the phone that uses that account.

Can't log in to LINE OA? What to check

Forgot the password of a business account

Open manager.line.biz
Select Log in with business account, then Reset password
Enter the email address and select Submit
Follow the steps in the email from LINE

This works while the email address can still receive mail.

Don't remember the email or password of your LINE account

Open the LINE app on your phone, check or change the email and password there, then log in again. See LINE's help page on email and password.

New phone

LINE account: move your LINE account to the LINE app on the new phone first, then log in to the LINE Official Account app
Business account: nothing to move, just log in on the new phone

Logged in but the shop's account isn't there

Log out and log in again the other way (LINE account or business account): it may be the one you signed up with
If someone else owns the shop's account, ask the owner to add you from the permission settings, then open the link you get to accept

When several people use the same LINE OA

Don't share one email and password. The owner can add team members from the permission settings, so everyone logs in with their own account. If the shop has several accounts or several people replying at once, Easyrobin brings chats from every LINE OA into one inbox, so the team replies without switching accounts.

Summary

Log in to LINE OA at manager.line.biz on a computer or in the LINE Official Account app. Pick the login you signed up with, enter the 4-digit code in the LINE app, reset a forgotten business account password from the login page, and move your LINE account first when you change phones.

Source: LINE Official Account help center, Log in (checked 28 October 2026)

LINE OA login on computer or phone, and how to fix it