Abstract: An infant bath seat device, particularly useful to facilitate the bathing of an infant in a sink, generally comprises a relatively stiff three sided shell including a back wall and two parallel side walls connected to and extending outwardly from the ends of the back wall and perpendicular thereto, with a seat flap connected to and extending outwardly from the back wall in the same direction as the side walls, in a plane perpendicular to the planes of the back and side walls. The seat flap and side walls are pivotally connected to the back wall, such that the seat flap and side walls may be folded in against the back wall in a collapsed configuration for storage.