Haopterus is a pterodactyloid pterosaur genus from the Barremian-Aptian-age Lower Cretaceous Yixian Formation of Liaoning, China. It was in 2001 named by Wang Xiaolin and Lü Junchang. The type species is Haopterus gracilis. The genus name honours Professor Hao Yichun and combines his name with a Latinised Greek pteron, "wing". The specific name, "slender-built" in Latin, refers to the condition of the metatarsals.