Abstract: A bathtub step assembly for use in bathing disabled persons. The step assembly has a plurality of planar surfaces disposed in spaced, generally parallel relationship to each other, the uppermost planar surface being coplanar with the top surface of the bathtub wall or walls that it is disposed adjacent to. The uppermost planar surface is also specifically shaped to provide adequate human buttocks support when the human buttocks engages the uppermost planar surface both when the human is disposed thereon with his/her back facing the bathtub and when the buttocks are pivoted approximately one-quarter turn to be in feet-first ingress position relative to the bathtub.