The corporation profit tax doesn’t tax the religious corporation as a principle. It’s when profit business was managed, that the religious corporation taxes. There are various views about this profit business. I’d like to understand what profit business is by seeing a precedent. It’s easiest to understand that profit business checks the precedent. When understanding profit business, the problem of religious corporation taxation can be settled. This paper treats a religious corporation, but the corporation profit tax is analyzed in the center. It’s expected that a religious corporation is able to understand.