The Biak roundleaf bat or Geelvinck Bay leaf-nosed bat (Hipposideros papua) is a species of bat in the family Hipposideridae. It is endemic to the Biak Islands (Schouten Islands) and Cenderawasih Bay (Geelvinck Bay) area of Papua Province, located in Western New Guinea, Indonesia.
It was described as a new species in 1886 by British zoologist Oldfield Thomas and Italian naturalist Giacomo Doria. They initially placed it in the now-defunct genus Phyllorhina, with the scientific name Phyllorhina papua. Its species name "papua" references Papua New Guinea where Odoardo Beccari collected the holotype.
As of 2008, it is evaluated as least concern by the IUCN—its lowest conservation priority. It meets the criteria for this assessment because it is locally common within its range. Its habitat is unlikely to be rapidly declining in extent and quality, and its population trend is projected as stable.