Abstract: A golf putting trainer may be utilized in combination with a golf putter to: a) position the putter face perpendicular to the shoulder line; b) provide a visual aid to set the shoulders parallel to the perceived putt line; c) train a golfer to execute a putting stroke by moving the shoulders, arms, hands, and putter in a synchronized motion around the stroke axis or upper spine; d) provide a visual aid to monitor the motion of the shoulders on-plane. The golf putting trainer may include an adjustable clamp, which can slide up and down the putter shaft to accommodate golfers of various sizes, a main shaft attached to the adjustable clamp, and a shoulder alignment guide attached to the main shaft that allow equal pressure to be applied against both shoulders of a golfer.