| 摘要 |
A reference state is envisioned in which a golf club is placed on a horizontal plane P with a predetermined lie angle and face angle, and the shaft axis line thereof is disposed within a reference plane that is perpendicular to the horizontal plane P. A center of gravity of the head G is positioned on the back side of the head from the reference plane, and a depth of the center of gravity D that is a distance between the reference plane and the center of gravity of the head G is 20 mm or greater and 30 mm or less. The golf club has a flexural rigidity value EIt (kgf.mm<SUP>2</SUP>) of the shaft at a position T 3 140 mm away from the tip on the head side being 0.5x10<SUP>6 </SUP>or greater and 1.75x10<SUP>6 </SUP>or less. More preferably, a value of a ratio (GIt/EIt) of the flexural rigidity value EIt to a torsional rigidity value GIt of the shaft at a position 140 mm away from the tip on the head side is specified to be 0.8x10<SUP>-2 </SUP>or greater and 1.2x10<SUP>-2 </SUP>or less.
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