Song Yun (Chinese: 宋雲; pinyin: Sòng Yùn; Wade–Giles: Sung Yün) was a Chinese Buddhist monk who was sent by the devout Buddhist Empress Hu (胡, ?-528 CE) of the Northern Wei Dynasty with some companions including the monk Hui Zheng, Fa Li and Zheng (or Wang) Fouze, to northwestern India to search for Buddhist texts. They left the Wei capital Luoyang, on foot in 518 and returned in the winter of 522 with 170 Mahayana Buddhist texts.