Golf club head and method for manufacturing the same

A method for manufacturing a golf club head which is manufactured by hot forging of low-carbon steel and in which a cavity is formed on the rear side of the face, the method comprising the steps of:

• forming a plurality of portions of irregularity by press processing during the hot forging in order to form the hitting surface for hitting a ball on the face;
• and
• flattening the forged surface of the portions of irregularity after forming the portions of irregularity so as to fine crystal grains in the portions of irregularity and the areas therearound and to form fiber flows thereby increasing strength and hardness of the hitting surface, wherein
• an iron golf club is manufactured by the method in which
• only projecting portions are crushed to be flat by cold forging after forming the portions of irregularity and thereafter the hitting face is subjected to machining process to smooth the surface by cutting processing, and
• score lines are formed on the hitting surface by processing by coining after the machining process.