Orthopaedic foot support (1) to support long-term bedridden patients, characterized in that the foot support includes a preformed support of two parts, i.e. a top piece (2) that consists of a stiff cushion (3) with an erect wall (4) and transverse supports (5,6,7) connected to it for the lateral support of the lower legs (16), and a bottom piece that consists of a base (8) on which the lower legs can rest and whereby the base (8) has a pair of cambers (10) to support the lower legs (16), and whereby the base (8) can be exchanged by a base with different cambers (10) suitable for another leg dimension, and whereby the top piece (2) can be removed to gain access to the legs of the patient who remains lying on the base (8), without having to move this base (8) or the legs (16).