Abu Bakr Mohammed ibn Ali al Sanhaji al-Baydhaq (Arabic: أبو بكر محمد بن علي الصنهاجي البيذق) (died after 1164) was a Moroccan historian mainly known as a companion of Ibn Tumart and chronicler of the Almohads. Al-Baydhaq (meaning pawn) was his nickname, because he was small in stature. He was from the tribe of Senhaja.