The video imagery gives important information to the dynamic analysis of human motion in the field of sports training or rehabilitation. For understanding the dynamics of human motion from image sequences, however, there are two complicated subjects. One is an image processing, for example, automated recognition of human's feature points such as head, shoulder, elbow, knee etc.. The second is, how to estimate the camera parameter in the photogrammetry. This paper presents a method to estimate the camera parameter, and shows the results of dynamic analysis in the case of boat rowing. In this study, the bow and no. 2, gold medalists in the Canadian eight team on the Barcelona olympic games at 1992 were selected.