To provide a swing practicing system for golf club, wherein degree of freedom in the installation position is high, the result of a swing can intuitively be known, and at the same time, a user can concentrate on the practice of the swing, and therefore, there are no failures or breakages.

The ball hitting area of the user who performs the swing of the golf club is determined, and a ball hitting direction is determined from the ball hitting area. Then, a microwave transmitting apparatus is arranged on the opposite side from the ball hitting direction, and on the outside of the swing range of the golf club. The microwave transmitting apparatus includes directivity toward the ball hitting position. The maximum speed of the golf club is obtained conforming to the difference in the frequency of the microwave which is generated when the microwave hits the golf club and returns.