Weight training machine having a selector device that is operated easily and conveniently

Abstract: A weight training machine includes a support frame, and a selector. The support frame includes two parallel guide rods, a plurality of weights, and a drive shaft. The selector device includes a selector that is inserted into a gap between any two adjacent weights and connected to the drive shaft, and a reel mounted on the selector and having a retractable pull wire having a distal end secured to the support frame. Thus, the pull wire of the reel is kept at a straight state constantly during movement of the selector, so that the pull wire will not interfere with operation of the selector and will not tangle with the weights, thereby facilitating the user operating the selector, and thereby protecting the user's safety.