Patent ID: 7377861

Claim:
A hollow golf club head comprising: a face part; a crown part; a sole part; a side part; and a hosel part, wherein the head has a volume of 100 to 250 cm3, and the head has a weight of 195 to 250 g, wherein the crown part includes: a large-thickness crown part formed along an overall edge thereof; and a small-thickness crown part which is formed inside the large-thickness crown part and has a thickness less than a thickness of the large-thickness crown part, wherein the side part includes: a heel-side small-thickness side part formed at a heel side; a toe-side small-thickness side part formed at a toe side; and a large-thickness side part which is formed at a portion of the side part other than the heel-side small-thickness side part and the toe-side small-thickness side part and has a thickness greater than the thickness of the heel-side small-thickness side part and the toe-side small-thickness side part, wherein a length of the large-thickness crown part, in a face to back direction is 4% to 30% of a length of the crown part in the face to back direction; wherein a length of the small-thickness crown part in the face to back direction is 40% to 92% of the length of the crown part in the face to back direction; and wherein the large-thickness crown part connects to a rear surface of the face part in a continuous manner.