The invention relates to an autonomous reclining seat element (1) in a simple tub (5), the reclining seat element being locked and rotatably mounted on the edge (1b) of the basin. Water (W) can be efficiently applied to the nozzles (2) by means of a circulating pump (26) with short pipes (27) that is arranged in the equipment container (12). The reclining seat element (1) is height-adjustable, tiltable and foldable, as an individual element or, by means of hinges (18), as multiple elements. Such a reclining seat element (1) has one or more floating bodies (13), armrests (3) with an operating panel (23) and an unbalance motor (22) if required.