Abstract: A training device used to instruct the student of tennis in developing a proper grip in connection with proper forehand and backhand swinging, service, volley or overhead strokes in which the execution of an imperfect swing resultant from insufficient gripping strength of the hand is accompanied by a noise and vibrant sensation to the trainee. The training device has an easily deformable elongated hand grip portion having an elongated shaft loosely extending along the longitudinal axis thereof. A pair of spaced apart slide collars are placed within the hand grip and loosely surround the shaft. One end of the shaft is provided with a stop knob while the other end of the shaft has a neck member attached thereto. When in a normal position, the stop knob is spaced from one of the slide collars and the neck member abuts one end of the hand grip.