Shawar ibn Mujir al-Sa'di (Arabic: شاور بن مجير السعدي‎, romanized: Shāwar ibn Mujīr al-Saʿdī; died 18 January 1169) was an Arab de facto ruler of Fatimid Egypt, as its vizier, from December 1162 until his assassination in 1169 by the general Shirkuh, the uncle of the Kurdish leader Saladin, with whom he was engaged in a three-way power struggle against the Crusader Amalric I of Jerusalem. Shawar was notorious for continually switching alliances, allying first with one side, and then the other, and even ordering the burning of his own capital city, Fustat, just so that the enemy could not have it.