Abstract: A training device for assisting a trainee in stroking a tennis racquet in such manner that the head of the tennis racquet does not shift in a vertical plane below the wrist of the trainee and, as such, always remains above the wrist of the trainee in such vertical plane. This training device comprises a harness which is secured to the body of the trainee and a cord which extends from the harness to the racquet. The opposite end of this cord is removably attached to the racquet at a point which is intermediate the head portion and the handle of the racquet. In this way, the trainee will always maintain his wrist below the head of the racquet and, in addition, the cord is adjustably sized so that it may be used to limit the forward and backward swing of the racquet in any stroking thereof by the trainee.