A wheelchair (100) comprises a bearing frame (1), wheels (R1, R2) connected to the bearing frame (1), a seat (2) having a frame (20) hinged to the bearing frame (1), a back (3) having a frame (30) hinged to the frame (20) of the seat, and an actuator (6) connected to the bearing frame (1) and to the frame (30) of the back to move the frame (30) of the back.