Who is the head of freemason?

Answer 1

There is no single head of Freemasonry. Each Grand Lodge has its own Grand Master who is nominally in charge of the subsidiary lodges in that region; but he has no control outside of his own Grand Lodge's jurisdiction.

Answer 2

Freemasons are organized into Lodges, and those Lodges belong to Grand Lodges. The leader of each Lodge is called the Master and the leader of the Grand Lodge is called the Grand Master.

There is, usually, one Grand Lodge per country. In some large countries like Canada, The United States, Mexico and Brazil there is one for each state or province. In the United States there are sometimes more than one Grand Lodge per state, because of the history of the Prince Hall Lodges. In countries without their own Grand Lodge, Grand Lodges from other countries sponsor individual Lodges.

None of the Grand Masters in answerable to any other; they are all independent. There is, therefore, no world leader for Freemasonry.