There two major fields of studying golf science. One is about the player’s movement during the swing. And the other is about the equipment. Basically ability of golf swing is related to player’s competence mainly, But researching the deflection of golf club during the swing is very important to improve equipment or select the right club for each player’s ability. Some attempts have been tried to understand the behavior of the golf club shaft during the swing. In those research not many subject were tried. So in this thesis 9 subjects of various competence in various handicap will try the swing while the behavior of the club shaft recorded. With this results the amount of Lead/Lag and Toe Up/Down and related meaningful figures of players at impact at different level will be compared.
