In this paper, the author states about the results of measurement of added moment of inertia and damping coefficieut about y axis, i. e. for pitching motion. A forced oscillation method same as was used by Golovato was employed for measuring device, and 14 series models varying C _b and L/B are used. As the added moment of inertia and the damping of pitching motion vary with the frequency of the motion, values of them corresponding to the natural pitching frequency are choosen as the typical values when discussing the effect of ship forms. A chart from which additional moment of enertia and damping coefficent of ships having arbitrary C _b, L/B and d/B can be obtained is proposed in this paper.