Abul-Qasim Babur Mirza (Persian: ابوالقاسم بابر میرزا بن بایسنقر بیگ), was a Timurid ruler in Khurasan (1449–1457).
Together with Ulugh Beg and Sultan Muhammad (who gained control of central Persia), Babur became one of the three important Timurid rulers.
The campaign started out badly for Babur, with a defeat at Mashad in March 1450 convinced him to cede parts of his territory.
Babur began to march against him but was forced to return to Herat, due to the overwhelming superiority of the Black Sheep's armies and a plot hatched against him by Ala al-Dawla Mirza.
While Kirman was temporarily conquered some time later and a few attempts were made to seize Ray, Persia as a whole was never retaken by the Timurids.