The invention concerns a wheelchair for assisting walking. The wheelchair comprises a chassis, a movable base that can move relative to the chassis between a low seating position and a high walking position, and a device for changing the position of the base. The device for changing the position comprises at least a first arm and a linear actuator. The arm forms a third-class lever. The linear actuator is configured to bias the movable base towards the high position by means of the arm.
