Abstract: A golf putter improves a golfer's ability to consistently impart a smooth putting stroke on the ball. The putter has an elastomer insert extending over a ball striking surface formed on the head of the club head. An inertial mass or ballast is formed at a rear central portion of the club head, with center portions of the ballast mass aligned with the vertical center line of the ball striking surface. The shaft portion of the putter is connected to the club head so that the longitudinal axis of the shaft intersects the center line of the club head and the inertial mass. The club head also has a base plate portion to assist the golfer in club grip and alignment during “set up” before the actual putting stroke.