Fan Ben (Chinese: 范賁; died 349), was a politician and emperor of the Cheng-Han dynasty during the Sixteen Kingdoms.
He was the son of Fan Changsheng, and after the fall Cheng-Han to the Jin dynasty (266–420) in 347, he led a restoration of the state, briefly ruling over it before his defeat and death in 349.
Fan Ben's family was from Danxing County (丹興縣; in present-day Qianjiang District, Chongqing) in Fuling Commandery (涪陵郡).
His father, Fan Changsheng, was a famous Taoist leader who supported the Ba-Di rebel, Li Xiong, in forming the state of Cheng-Han in 304.
In the summer of that year, Jin's Inspector of Yizhou, Zhou Fu and the general, Zhu Dao (朱燾) campaigned against him.