Senate is one of the three branches of the National Iranian Congress. The NIC Senate proposes and considers new laws and legislations, nominate Secretary General and Attorney General of the National Iranian Congress, approves or rejects executive and judiciary branches nominations, provides advice and consent on international treaties.

Senate shall be composed of a hundred senators led by Seven members of Senate Leadership.

A Senate committee usually examines and discusses a bill and then accepts or rejects it. The full Senate votes on accepted bills. Each Senator will serve for three years.