Qazaghan (died 1358) was the amir of the Qara'unas (1345 at the latest – 1358) and the effective ruler of the Chagatai ulus (1346–1358).
[3][4] Qazaghan's lineage is mostly unknown; it is possible that he became head of the Qara'unas through appointment instead of inheritance[5] In 1345 he rebelled against his sovereign, the Chagatai Khan Qazan, but was defeated.
Qazaghan, in the interest of maintaining an image of legitimacy, contented himself with his title of amir and conferred the title of khan on descendants of Genghis Khan of his own choosing: first Danishmendji (1346–1348) and then Bayan Quli (1348–1358).
During the twelve years that Qazaghan served as the power behind the throne, the khanate devolved into a loose confederation of tribes that respected the overall authority of Qazaghan and his puppet khans, although he primarily commanded the loyalty of the tribes of the southern portion of the ulus.
He also sent several thousand troops to aid the Sultan of Delhi, Muhammad bin Tughluq, against rebels in his country in 1350 or 1351 and also supported his son Firuz Shah Tughlaq to the throne.