Patent ID: 7387580

Claim:
A golf putter head comprising: a head body having a face surface, said head body including a body front portion including the face surface and extending in a toe-heel direction and a body rear portion extending in a face-back direction from a toe-heel center of a back side face of the body front portion, the body front portion and the body rear portion being formed in one piece; and a head rear portion affixed to a back-side end of the body rear portion and having a greater specific gravity than that of the head body, wherein provided that S 1 represents a cross-sectional area of the head body with respect to a cross-section taken at a boundary portion between the body rear portion and the head rear portion and along a plane parallel to the face surface, whereas S 2 represents a cross-sectional area of the head rear portion with respect to a cross-section taken at the boundary portion and along a plane parallel to the face surface, a value of (S 2 /S 1 ) is 1.1 or more and 2.0 or less.