Patent ID: 7331877

Claim:
A golf club head in which when a horizontal direction from a toe side toward a heel side is set to be an X direction, a vertical and upward direction is set to be a Y direction, coordinates of a center of a hitting surface are set to be (0, 0) and coordinates of a maximum resilience point in the hitting surface are set to be (x, y), and wherein the maximum resilience point is displaced from the coordinates (0, 0); y is equal to or greater than −5 mm and is equal to or smaller than 10 mm, and x is equal to or greater than −10 mm and is equal to or smaller than −3 mm; a value of (t 2 −t 1 ) on the center of the hitting surface which is measured in accordance with a pendulum test determined by USGA is smaller than 250·10 −6 second; and the value of (t 2 −t 1 ) on the maximum resilience point which is measured in accordance with the pendulum test determined by the USGA is 250·10 −6 second or more.