Apparatus for training golfers in putting techniques and the method for its use are taught. The principle of the apparatus of the invention provides two reference points, one of which is adjustable and fixed relative to the head of a putter. By sliding the two reference points along a guidance surface, the putting head moves parallel to the guidance surface with the face of the putting head at a constant angle to the guidance surface. i.e. this is a putting stroke. One of the reference points may be a part of the putter head and the other is a member, removably attachable to the putter and adjustable so that a contact head touches, and is slidable along, the guidance surface.