To enable a player to easily hit a spin shot by a method wherein the sole is formed into a cross section wherein the curvature of a cross section part, etc., along a curve of the parabolic part is made smaller, and the curvature is made larger as becoming closer to the upper side, and also, on the face surface, fine protuberances which facilitate the applying of a back spin are formed into a sand paper state.

The face 10 of the head 9 of a No. 9 iron club, etc., is formed larger by 1.5-2 times than a normal club to expand the sweet spot, and a cross sectional shape being orthogonal to its sole 11, is formed into a shape going along the linear part 13' of a parabolic 13 having a focal point 12 (the curvature on the sole side is smaller, and that of the upper side is larger). Then, on the surface of the cross section, conical protuberances 14, of which the height is within a range of approx. 1-2mm, and a distance between respective peaks of which is within a range of 1-3mm, are thoroughly, uniformly and densely formed into a sand paper state. Thus, at the time of an impact when a player hits a ball by the face 10 of the head 9, a strong back spin is imparted to the ball to fly the ball up.