1. On Facebook application open your Facebook page and click on the Settings button on the top.
Facebook Page Settings On Facebook Application
  1. Click on Instagram on the Settings menu.
  1. You will see a Connect Account at the bottom of the page.
  1. Login with your Instagram account.
  1. After validating the Instagram account, it will be connected with the Facebook page.

Now, you can manage the Instagram account from the Facebook page.