To simplify the structure of a toss machine and reduce the number of its parts for reducing its unit price.

Employing several flat springs for a ball projecting arm can freely change the projecting strength of the toss machine, and a vibration stopper arm or a vibration absorbing pad alleviates the vibration of the ball projecting arm after it projects the ball. By adjusting the position of a roller for stopping the rotation of a ball projecting hammer, the strength of hitting the ball can be adjusted freely, and balls of a same carry can be shot and also its structure is simplified.