Abu Salih Mansur (died 915) was a Samanid prince, who served as governor during the reign of his uncle Isma'il ibn Ahmad, his cousin Ahmad Samani, and Nasr II.
During his governorship of Ray, he became friends with Muhammad ibn Zakariya al-Razi,[1] a famous Persian scholar.
Abu Salih was taken prisoner until the rebellion was crushed by a Samanid army under Husain ibn 'Ali Marvarrudhi in 913.
In 914, Mansur was appointed governor of Khorasan, but anarchy was unleashed by the death of Ahmad ibn Ismail and the ascent to the throne of the 8-year-old child Nasr II.
Mansur died a natural death in Nishapur probably in 915, before an army sent against him led by Hammuya ibn Ali reached the city.