Sui Gu (died 199), Baitu (白兔), was a vassal serving under the warlord Zhang Yang during the late Han Dynasty period of Chinese history. When Zhang Yang was killed by Yang Chou out of fear for him joining Lü Bu, Sui avenged his lord by killing Yang Chou. Afterwards, Sui Gu went on to serve under Yuan Shao. However, Sui Gu was attacked and killed by Cao Cao's forces during the Battle of Guandu.