A chair for disabled persons has a supporting frame, a seat adjustably connected to the supporting frame by a hinge, and a back adjustably connected by a hinge to the rear of the seat. The seat has a front section which lies beneath and supports the upper legs of an occupant, and a rear section which lies beneath and supports the pelvis of an occupant. The front and rear sections can be fixed and adjusted independently of each other due to a hinge which is parallel to the hinge at the rear of the seat.