Patent ID: 7857713

Claim:
A hollow wood-type golf club head having a head volume of 420 to 500 cm 3 , and comprising a face portion having a hitting face for hitting a golf ball on a front side and a sole portion extending from the lower edge of the hitting face and forming a bottom surface of the club head, wherein: said face portion is made of a metallic material having a specific gravity of 4.30 to 4.60 and has a thickness of 1.5 to 4.0 mm, in a standard state that the club head is placed on a horizontal plane at prescribed lie and loft angles, an X/Y ratio is 0.0070 or less in which X is a depth (mm) of the center of gravity of the club head which is a horizontal length between the center of gravity and a sweet spot on said hitting face in a front-rear direction of the club head, and Y is a moment of inertia (g·cm 2 ) of the club head about the vertical axis passing through the center of gravity, said hitting face is convexly curved such that an intersection line of said hitting face and a horizontal plane including the sweet spot is convex toward the front of the club head, and a radius of curvature Rc of said intersection line is from 330.2 to 457.2 mm, and a radius of curvature on a heel side portion of the intersection line is larger than each of radii of curvature of a middle portion and a toe side portion of the intersection line by at least 12.7 mm, said sole portion is provided with a toe side weight member Wt disposed on a toe side and a heel side weight member Wh disposed on a heel side, and the center of gravity of each of the weight members Wt and Wh is located on a front side of the center of gravity of the club head, and said club head comprising a head body and a face member which constitutes a main part of said face portion and is fixed to said head body, in which said face member is made of a first titanium alloy having a Young's modulus of 120 to 150 GPa and said head body is made of a second titanium alloy having a larger specific gravity than that of said first titanium alloy.