A medical device for assisting patients in walking who have sustained injury to the lower portion of their legs or feet. The device supports the patients knee and is controlled by the patients hand and arm. The device includes an elongate ground-engaging upright stanchion having an upwardly extending vertical axis when a user is standing. The stanchion has a top and a front, and a knee holster affixed to the top of the stanchion for receiving the users knee. A handrail projects upwardly and frontally from a top of the holster at an angle of between 15 and 35 degrees from the vertical axis. The handrail has a hand-gripping portion located such that when gripped by the user while standing an angle of approximately 90 degrees is formed at the users elbow between the forearm and the upper arm.