Golf club shaft and method of manufacturing the same

A golf club shaft comprising a club shaft body made of a fiber-reinforced resin and a reinforcing layer of a resin film formed of an organic polymer and overlapped annularly on and unitarily with a surface of the club shaft body, said reinforcing layer extending on the club shaft body from a front end of said club shaft body towards a rear end of said club shaft body for a distance of not less than 150 mm and not more than 500 mm;

• wherein
• a rear end portion of said reinforcing layer which extends from a rear end of said reinforcing layer to a point on said reinforcing layer which is 50 mm distant from said rear end toward the front end of said club shaft body has a thickness of from 0.01 to 0.05 mm;
• a portion of said golf club shaft which is 30 mm distant from a front end of said golf club shaft has an impact strength not lower than 10 J;
• and
• said rear end portion of said reinforcing layer has a reduced thickness relative to the thickness of a front end portion of said reinforcing layer that extends from the front end of said club shaft body toward the rear end of said reinforcing layer to a point 30 mm distant from said front end.