Afrixalus lacteus is a species of frog in the family Hyperoliidae. It is endemic to Cameroon and known from a few mountains in the western part of the country; specifically, it has been recorded from Mount Manengouba (its type locality), Mount Nlonaka, and the southern Bamileke Highlands (Mount Bana, Foto, and Batie). Common name Cameroon banana frog has been coined for it. Prior to its description, it was confused with Afrixalus lindholmi.