Abstract: The habits of the golfer can be determined during the address from the coincidence status between a reference line 4 and a center line 8 or the plus or minus graduation (judgement) lines 9 or 10 by providing the reference line 4 on the upper face 2 of head 1, providing a view window 6 at the backward of this reference line 4, and by providing the center line 8 and the plus and minus graduation lines 9 and 10 downward the view window 6. Further, more than two parallel lines 11 can be provided on the upper face 2 of head 1. Moreover, the graphics 14 of the club (pole side) and graphics 15 of the ball (head side) are completed when the setting has been made correctly. The graphics 14 is provided on the upper face 2 of head and the pole 12. In addition, the judgement line 7 shall be previously provided to the heel or toe side.