Abstract: A golf downswing guide which prevents medial rotation (rotation towards the center of the body) of the right arm for a right handed golfer during the backswing but more specifically during the downswing. The device consists of a lower and an upper elongated member joined together by an elbow joint which allows pivoting on a single plane. The device attaches to the right arm (for a right handed golfer) A counter acting elongated member is mounted on the lower and upper elongated members by means of pivoting joints. A holding device consisting of a pivoting arm with an elongated opening at the non-pivoting end is attached to a ratchet device which is attached to a base section which in turn attaches to the waist area of the golfer.