This paper presents a training system of pedaling skill for a cyclist. In order to maximize the competition performance of a cyclist, improving the pedaling skill, that converts his/her physical strength to the impulsive force of a bicycle, is effective. In the field of cycling competition, the pedaling skill has been vaguely discussed for a long time. Then, this study have proposed a method to visualize the pedaling skill by using the kinetic information of a cyclist who pedals on a bicycle. In this paper, we make a training system for the improvement of pedaling skill and discuss the experimental results.