A golf club head includes a casing with a front open end to which a
striking plate is attached through a layer of brazing material that is
formed between a rear surface of the striking plate and a frontmost end
face of the casing. One of the striking plate and the front open end of
the casing has an extension part which projects outward in a direction
away from the opening. The extension part forms a shoulder with one of
the first and second outer peripheral faces. During a brazing process,
the brazing material is positioned against the shoulder externally of a
clearance between the rear surface and the frontmost end face and is then
melted to flow into the clearance through a capillary action.