Lei Xu, alternatively Lei Pu or Lei Bo, (died c. 209) was a military officer and rebel who was mainly active in the 200s in China. Initially loyal to warlord Yuan Shu, Lei Xu abandoned his master when the latter's regime collapsed, becoming an independent bandit. In 200, he accepted the authority of Liu Fu, an official loyal to Cao Cao, but rebelled again in 208. In the following year, he was killed by Cao Cao's general Xiahou Yuan.