Device for facilitating access to a sanitary fitting, which comprises a guide mechanism (13) associated with the sanitary fitting and a chair provided with a seat, front legs (2) and rear legs (3), which also comprises means (5,6) for coupling the seat to the guide mechanism (13) and means for moving the rear legs (3) from a seat-support position to an inactive position. The means for coupling to the guide mechanism (5) for shortening the rear legs is activated as a consequence of the manual forward rotation of the front legs (2). This device makes it possible to place, in a bathtub or in or on another sanitary fitting, a person requiring assistance for such functions, and it may also be handled by a single assistant.