The invention relates to a knee rehabilitation device, comprising a foot assist that can be attached to the leg, and a motion device which moves the assist in a given direction.The essence of the invention lies in that the leg is supported in a heel case (1) placed on the heel, where the heel case (1) is coupled to an appropriate frame, and the device contains an actuator that moves the leg set in the heel case (1) in a vertical direction with given amplitude, and the actuator is joined to the axis of a motor (15), which is coupled to a control unit (16).
