Abstract: A bathtub mountable chair seat for the transfer of a physically challenged bather from the exterior of a typical bathtub to the interior of the bathtub for bathing. The chair seat allows wheelchair accessibility in confined spaces and mechanical maneuverability in transferring the bather. The chair seat provides support for the legs or the any portion or member of the legs of the bather during transfer and/or while bathing. The chair seat has a back attached thereto suitable for supporting the bather in a sitting position. The chair seat has a leg extension housing mounted thereto in such a way as to allow selectable extension of a portion thereof that supports the bather's legs. The chair seat along with the leg extension housing is rotatably affixed to a rectangular member that is slidably insertable into a rack adapted to rest on the longitudinal edges of the bathtub. The chair seat has an arcuately shaped telescoping frame canopy mounted thereto to aid the bather in standing while bathing.