An apparatus and method for assisting a golfer to improve his/her putting stroke. The apparatus comprises two elongate positioning members having two upper end portions which the golfer places between his/her upper arm portions and upper side torso portions. The shaft of the putter is connected to the two lower end portions of the positioning members. The golfer grasps the hand grip of the putter while his/her upper arms press against the upper end portions of the positioning members. Thus the golfer's upper torso portion, the two positioning members, and the putter, are substantially stationary relative to one another. Then the golfer properly executes the putting stroke by moving the upper torso to cause the golfer's arms, the positioning members and the putter to move as a unit with the golfer's upper torso portion.