Muqatil ibn Atiyah ibn Muqatil al-Bakri al-Hijazi (; ) was allegedly a medieval authority of the Nizamiyya of Baghdad, and son-in-law of Nizam al-Mulk. He was
He is known only by a treatise in Arabic that he wrote, Mu'tamar Ulama' Baghdad (), in which he recounts in detail a Sunni-Shi'i debate taking place in the court of Sultan Malik Shah I. It has been translated into Persian under the title In search of Truth in Baghdad (), as well as under the title ().