To solve such a problem that an end mill, a reamer and a drill having no supply hole for discharging fluid and having 2-6 cutting edges are generally most commonly used in conventional cutting, however, cutting chips and heat which are generated during cutting, and alteration due to cutting which affects a workpiece cause the shortening of a tool lifetime and deterioration in workpiece quality, therefore, a cutting tool developed for conventional metal materials cannot perform high-efficiency machining on workpiece materials of various composite materials which are adopted for the natural environment and an improvement in fuel consumption and used in industries including aircraft and automobiles due to the significant shortening of the tool lifetime and the significant deterioration in workpiece quality.

A cutting tool is configured so that a cutting edge having a different torsion angle is further formed on each cutting edge of tools such as end mills or drills and reamers. It is also possible to form the right and left torsion angles of the cutting edge on the cutting edge differently from each other.