Abstract: A golf training device features a support base with a light source attached thereto, the light source generating a planar-shaped beam of light which is projected forward of the support board to form a target line on the ground. The target line can be used in alignment of the golfer's body and club face before and during the striking of the golf ball. A pair of removably attachable elongated guide rails can be attached to the top of the support base to provide a guide path for the golfer to move the club head therethrough while putting a golf ball from the top of the support base. The positions of the guide rails can be selected to accommodate putters having different club head lengths, as well as to provide for lesser-constrained guide paths. The light source includes a laser and a cylindrically-shaped optical element placed transversely to the light beam to create the planar-shaped beam.