A golf club head comprising: a hitting face that includes a face center; a crown surface; and a sole surface, wherein a boundary portion between the hitting face and the crown surface has a curvature radius denoted by R, a boundary portion between the hitting face and the sole surface has a curvature radius denoted by S, the hitting face has a face height denoted by F, the golf club head has a head thickness denoted by T, the curvature radius R at a position spaced 15 mm apart from the face center toward a toe side is referred to as a curvature radius Rt, the curvature radius S at the same position is referred to as a curvature radius St, the face height F at the same position is referred to as a face height Ft, and the head thickness T at the same position is referred to as a head thickness Tt, the curvature radius R at a position of the face center is referred to as a curvature radius Rc, the curvature radius S at the same position is referred to as a curvature radius Sc, the face height F at the same position is referred to as a face height Fc, and the head thickness T at the same position is referred to as a head thickness Tc, the curvature radius R at a position spaced 15 mm apart from the face center toward a heel side is referred to as a curvature radius Rh, the curvature radius S at the same position is referred to as a curvature radius Sh, the face height F at the same position is referred to as a face height Fh, and the head thickness T at the same position is referred to as a head thickness Th, characterised in that Ft/Tt is smaller than Fh/Th, and the golf club head satisfies the following relationship: Rt > Rc ≥ Rh; and/or the following relationship: St > Sc ≥ Sh. a hitting face that includes a face center; a crown surface; and a sole surface, wherein a boundary portion between the hitting face and the crown surface has a curvature radius denoted by R, a boundary portion between the hitting face and the sole surface has a curvature radius denoted by S, the hitting face has a face height denoted by F, the golf club head has a head thickness denoted by T, the curvature radius R at a position spaced 15 mm apart from the face center toward a toe side is referred to as a curvature radius Rt, the curvature radius S at the same position is referred to as a curvature radius St, the face height F at the same position is referred to as a face height Ft, and the head thickness T at the same position is referred to as a head thickness Tt, the curvature radius R at a position of the face center is referred to as a curvature radius Rc, the curvature radius S at the same position is referred to as a curvature radius Sc, the face height F at the same position is referred to as a face height Fc, and the head thickness T at the same position is referred to as a head thickness Tc, the curvature radius R at a position spaced 15 mm apart from the face center toward a heel side is referred to as a curvature radius Rh, the curvature radius S at the same position is referred to as a curvature radius Sh, the face height F at the same position is referred to as a face height Fh, and the head thickness T at the same position is referred to as a head thickness Th, Ft/Tt is smaller than Fh/Th, and the golf club head satisfies the following relationship: Rt > Rc ≥ Rh; and/or the following relationship: St > Sc ≥ Sh.