The President pro tempore of Mercosur (PPT) is the highest legal-political representative pro tempore of the Southern Common Market (Mercosul).

The office is held for a six-month period by a head of State of one of the State members.

It is alternated, in alphabetical order, among the presidents of Argentina, Brazil, Paraguay, Uruguay and Venezuela (suspended from the organization).

The ceremonial mallet given to the holders of President pro tempore of Mercosur is a handicraft gavel, which is given to every new holder.

[1][2] (suspended)[3]