Patent ID: 8435137

Claim:
A golf club head having a hollow structure comprising a front member including a face portion and a hosel portion of the club head, a rear member forming a backmost point of the club head, and an intermediate member disposed therebetween and extending annularly through a crown portion, a sole portion and a sidewall portion therebetween, wherein the front member and the intermediate member are overlapped with each other in the crown portion and the sole portion, forming a front-side overlap joint, and the rear member and the intermediate member are overlapped with each other in the crown portion and the sole portion, forming a rear-side overlap joint; and wherein the front member is made of a material having a specific gravity ρ 1 , the intermediate member is made of a material having a specific gravity ρ 2 , the rear member is made of a material having a specific gravity ρ 3 , and the specific gravity ρ 3 is more than the specific gravity ρ 1 which is more than the specific gravity ρ 2 ; and wherein a sole-side average overlap width AWs obtained by averaging the width of the front-side overlap joint and the width of the rear-side overlap joint in the sole portion is more than a crown-side average overlap width AWc obtained by averaging the width of the front-side overlap joint and the width of the rear-side overlap joint in the crown portion.