A golf club head having face, crown, sole and side portions, and comprising a metal head base body (M) having at least one opening and a cover (FR) arranged in the opening and made of a material having a specific gravity smaller than the base body, wherein when the head is sectioned into head toe side portion (1t) and head heel side portion (1h) by a vertical plane including a normal line drawn from a head center of gravity to a face surface, the surface area of The cover covering a portion of the opening included in the head toe side portion is larger Than the surface area of the cover covering a portion of The opening included in the head heel side portion, and the weight of the head heel side portion (1h) is from 55 to 75% of the entire weight of the head.