PURPOSE: To utilize the right and left side faces of a putter head as face planes and to change how to apply back spin or the rolling distance of a ball while keeping the same hitting form concerning one and the other face planes.

CONSTITUTION: This putter is provided with a putter head 12 forming face planes 9 and 10, for which any one of loft angles θ1 and θ2 and hitting ball thickness m1 and m2 is made different, on the left and right side faces of a face member 11 for which the shapes of a toe side and a heel side are made symmetric to a linear shaft 8 and the structure of an inner cavity 13 is formed, and how to apply the back spin or the rolling distance of the ball is changed by using one and the other face planes 9 and 10 while switching them.