The DLT method is often used to analyze the golf swing motion. This paper proposes the correction method of the measured error which is occurred in the image. As a human body is modeled by links, link length is constant and the measured angle between links become smooth curves in time series so to satisfy the condition the measurement point is corrected iteratively. To investigate the effect of this method, Monte Carlo simulation is used. Then it is known that this method is greatly improved the accuracy of measured point and the joint torque which is obtained by Newton Euler method.