Patent ID: 8251835

Claim:
A golf club head comprising: a face; and a face line formed on the face, wherein a depth D1 (mm) of the face line is 0.100 (mm) or greater and 0.508 (mm) or less; and when a first curvature radius is defined as r1 (mm) and a second curvature radius is defined as r2 (mm) in a section of the face line, the first curvature radius r1 is smaller than the second curvature radius r2; and wherein when an upper end point of an edge of the face line is defined as Pa; a point placed at a position of which a depth is 0.015 mm is defined as Pb; a point placed at a position of which a depth is 0.030 mm is defined as Pc; a point placed at a position of which a depth is [(D1−0.03)/2+0.03] (mm) is defined as Pd; and a point placed at a position of which a depth is [D1/4] (mm) is defined as Pe, the first curvature radius r1 is a radius of a circle passing through the point Pa, the point Pb, and the point Pc; and the second curvature radius r2 is a radius of a circle passing through the point Pc, the point Pd, and the point Pe.