Chan Siu-bak (陳少白) (born Chan Siu-man (陳紹聞); 20 July 1869 – 23 December 1934), courtesy name Siu-bak (少白), art-named Kwai-shek (夔石), was a Chinese revolutionary from Xinhui, Guangdong. He was one of the Four Bandits, together with Sun Yat-sen, Yau Lit and Yeung Hok-ling.