Wu Song, nicknamed "Pilgrim",[1] is a fictional character in the Water Margin, one of the Four Great Classical Novels of Chinese literature. He ranks 14th of the 36 Heavenly Spirits of the 108 Liangshan heroes. Wu Song also appears in the novel Jin Ping Mei. According to legend, he is a student of the martial artist Zhou Tong.

   Wu Song is from Qinghe County (present-day Dongping County, Tai'an, Shandong). He is described as a good-looking man with shining eyes, thick eyebrows and a muscular body and gives people an impressive bearing. Once, he knocked out a person in a drunken fit. Misunderstanding that he had killed that person, he flees to Chai Jin's residence for security and meets Song Jiang there. The two later become sworn brothers