Abstract: A golf instruction device is disclosed which teaches golfers to learn and execute an inside-out swing. The device consists of a horizontal base that is placed on a supporting surface such as the ground or floor in a practice tee area. A guiding member that guides club head movement during the swing projects upwardly from the base and includes three guide sections. The first is a straight section that lies on the line of intended ball movement, the second extends rearwardly from the first section and curves inwardly relative to the golfer, and the third section is straight, extending forwardly from the first section but diverges outwardly or away from the golfer. By following the three guiding sections during the backswing and foreswing, the golfer learns to execute the inside-out swing properly.