An improved head of the golf club is provided, which increases the flight distance according to the elastic force enlargement and improves directionality. An improved head of the golf club comprises: a space part formed in the hollow of cast body; a driver which is equipped with crown part part(C), hitting surface(F), and sole side part(B) and is integrally formed; a heel edge in which the hitting surface of the head and crown part are connected and which is curved in the circular arc body; and an eye line leading unit(G) which is extended on the same plane as the heel edge and is protruded.
