Abstract: A golf swing training device includes a swing guide that may be fitted to a golf club at the club's butt end. The swing guide includes a telescoping shaft part, an end cap an extension received on the golf club and a hinge that pivots the extension relative to the telescoping shaft. The hinge allows a golfer to adjust the angle between the telescopic shaft and golf club shaft to suit her or his posture at address. The telescopic shaft may be lengthened or shortened as well.