A putting training device used to teach a new method of putting that teaches the golfer to swing the putter along a target line that extends between the golfer and the hole and to adjust the angle of the putter head to match the final slope angle of the putting green. The device includes an elongated planar member with a longitudinally aligned target line indicator, a plurality of left and right swing-force indicators, and a putter head angle scale printed thereon. The planar member lays flat on the ground and is aligned so that the target line indicator is longitudinally aligned with the target line that points directly to the hole. The user then determines the final slope angle of the green and then identifies a reference line on the putter head angle scale that matches the final slope angle. The user then swings the putter with the face maintained in an opened or closed position that matches the selected reference line.