The New Guinea flightless rail (Megacrex inepta), also known as the Papuan flightless rail, is a species of bird in the family Rallidae, in the monotypic genus Megacrex.
It is found in Indonesia and Papua New Guinea. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical mangrove forests, and subtropical or tropical swamps. It is threatened by habitat loss.