Qifu Mumo (Chinese: 乞伏暮末; died 431), courtesy name Anshiba (安石跋), was the last prince of the Xianbei state Western Qin. When he succeeded his father Qifu Chipan (Prince Wenzhao) in 428, Western Qin was already in a state of decline, under incessant attack by Northern Liang, Xia, Tuyuhun, and Chouchi, but under Qifu Mumo, who had a violent temper, Western Qin declined further, and in 431 the Xia emperor Helian Ding, his own state nearing destruction, captured and executed Qifu Mumo, ending Western Qin.
It is not known when Qifu Mumo was born, nor is the name of his mother known—other than that she was neither his father Qifu Chipan's princess Princess Tufa, nor her sister Consort Tufa. The first historical reference to him was in 420, when Qifu Chipan created him crown prince—and by that time, he was already a major general, for the historical reference mentioned that he "remained" a general. In 424, his father sent him and his uncle Qifu Muyigan (乞伏木奕干) to attack Northern Liang, and they were victorious. A campaign that Qifu Mumo carried out with his father against Northern Liang in 426 would be far more disastrous, however, as the Northern Liang prince Juqu Mengxun not only repelled their attacks but persuaded the Xia emperor Helian Chang to attack Western Qin's capital Fuhan (枹罕, in modern Linxia, Gansu). Helian Chang, in response, sent his general Hulu Gu (呼盧古) to attack Wanchuan (苑川, in modern Baiyin, Gansu) and Wei Fa (韋伐) to attack Nan'an (南安, in modern Dingxi, Gansu), and while Western Qin was able to hold Wanchuan, Nan'an fell, at great loss. In winter 426, Xia forces commanded by Hulu and Wei attacked Fuhan, forcing Qifu Gangui to move the capital to Dinglian (定連, also in Linxia), and Hulu and Wei then captured another important Western Qin city, Xiping (西平, in modern Xining, Qinghai), and while they then withdrew, Western Qin had been dealt a major blow.