Patent ID: 7278925

Claim:
A hollow golf club head comprising a face portion whose front face defines a club face for hitting a ball, a crown portion intersecting the club face at the upper edge thereof, and a sole portion intersecting the club face at the lower edge thereof, wherein said face portion comprises a center portion forming an area having a sweet spot, and a peripheral portion surrounding the center portion and having the thickness smaller than the thickness of said center portion, wherein the peripheral portion comprises a crown side portion provided between said center portion of the face portion and the crown portion, and a sole side portion provided between said center portion of the face portion and the sole portion, the thickness of said peripheral portion is reduced from the sole portion side toward the crown portion side, and a ratio (t 3 /t 2 ) between the thickness t 3 of the sole side peripheral portion and the thickness t 2 of the crown side peripheral portion being in a range of from 1.2 to 2.0, in a vertical cross section passing through a centroid of the club face under a standard condition in which the club head is placed on a horizontal surface at its lie angle and its loft angle.