This paper describes about the method for fair surface generation in ship hullform design aiming at the automatization of surface fairing. It generates an approximating surface from section curves according to the distribution of curvature. The generated surface has dense parameters in high curvature areas, and sparse parameters in low curvature areas. This method has three advantages de-scribed below. First, it can suppress the distortions generated by traditional methods. Second, it can use additional curves that cannot be used in traditional skinning methods. Finally, it can do surface fairing efficiently without the great loss of geometric feature.