Gunther's banded tree frog, Hypsiboas fasciatus, is a species of frog in the family Hylidae. The species was redelimited in 2014 and the most of the earlier records assigned to this species refer to Hypsiboas maculateralis, Hypsiboas alfaroi, and Hypsiboas tetete, possibly also to unnamed species. It is known with certainty only from the upper and lower montane forests on the western edge of the Amazon Basin in Ecuador (Zamora-Chinchipe, Morona-Santia, and Pichincha Provinces) and Peru (Amazonas Region), at elevations of 730–1,530 m (2,400–5,020 ft) above sea level.