Telmatobius brachydactylus is an endangered species of frog in the Telmatobiidae family. This semiaquatic frog is endemic to tributaries of Lake Junín (not in the lake itself) in central Peru, where it is found at altitudes of 4,000–4,600 m (13,100–15,100 ft). It is threatened by capture for human consumption. Although a fairly large species, it is smaller than the closely related and equally threatened Lake Junin frog (B. macrostomus).