A golf swing training apparatus is disclosed. The invention includes a harness for use in connection with a bifurcated training apparatus having two operative elements, including an upper grip portion and a lower slide portion, the portions configured to be cooperatively engaged both with a golf club and each other in a defined cooperative manner. When assembled in the preferred truncated frustoconical structure, the lower slide portion is axially slidable along a length of golf club handle to assist the golfer to learn a desired swing position. An upper grip portion is secured about the golf club handle, whereby when the upper grip portion is assembled to the club handle and shaft, and a plurality of fingers of the golfer's left hand overlays a portion of the upper grip portion, those two to three fingers of the left hand substantially engaging and gripping upper grip portion during all stages of the golf swing, whereby the upper grip portion and lower slide portion are brought into full engaged position at about the point of contact of the golf club and the golf ball.