Abstract: In one embodiment, the present invention is a relatively thin, portable device for improving golf putting skills. The device comprises an alignment member and two securing members. The alignment member, which has an elongated and substantially linear shape such that the alignment member can be aligned with a desired trajectory of the golf ball, has indicia thereon for assuring alignment of a putt when the ball is set into motion. Further, the alignment member has indicia thereon to guide a user in making putts using the “straight back, straight through,” “inside, down the line,” and “inside, square, inside” putting methods. The securing members extend perpendicularly from one end of the alignment member in opposite directions such that the putting device is T-shaped. Each securing member has at least one aperture through which a golf tee may be inserted to secure the putting device to a putting surface.