Phrynopus oblivius is a species of frog in the family Strabomantidae.

It is endemic to central Peru and only known from near its type locality near Maraynioc, in the Tarma Province, Junín Region, at about 3,210–3,220 m (10,530–10,560 ft) asl.

Skin on dorsum is smooth and has few, small tubercles and forms discoidal folds.

[2] The known specimens were found in remnants of a cloud forest, all beneath rocks next to a small creek.

It is possible that habitat loss is occurring in the general area of type locality.