The chair has a backrest (1), a seat (2) and a footrest (3) as well as a headrest (4) with a rear plate (6) for support on the edge of the pool with outlet holes for air and/or water driven by one or more pumps located on the headrest (4), to be carried through distribution ducts (8). The parts constituting the seat are articulated allowing for both partial and total folding and thus achieving a volume reduction both when folded and not in use but in the pool, and in a storage situation making it a device that can be purchased, transported and installed immediately without the need for work or emptying the pool, or assembly of the seat which merely requires unfolding； having provided that the distribution of air and/or water is made by the rotational bearings fitted.
