Abstract: A putting stroke training device is removably attached to a putter in a simple one step action. A body of the training device is attached to a conventional putter and includes a C-shaped, resilient attachment member that deforms to fit over the top-line of conventional putters and, by operation of memory of the material, abuts snugly to the back face of the putter in the back cavity. Two parallel alignment guide members extend from the body perpendicularly to the face of the putter. The training device is held in place by operation of the device itself without relying upon some non-integral means for attachment. The two parallel alignment members or fingers, extending perpendicularly from the putter club face, act as a guide between which an individual strikes a golf ball.