Cutting Tool

A cutting tool comprising:

• cutting edges formed by a plurality of side surfaces on opposite sides of each cutting edge with the side surfaces being raised regularly along a rotating direction around a rotation center axis at a side portion along a longitudinal direction,
• a main coolant passage pipe extended around a rotation center axis of the cutting tool, and
• branched coolant passage pipes branched from the extended main coolant passage pipe and projected along a direction of a raised side surface on a rotating direction side of the raised side surfaces on opposite sides,
• wherein on an entire area of the raised side surface on the rotating direction side from a raised end site which is at a minimum distance position from the rotation center axis in which the raised side surface starts to a leading end of the raised side surface, a projected portion which faces the rotating direction side is provided along a direction from the raised end site toward the leading end at opposite sides of the raised side surface in a direction orthogonal to a widthwise direction of the raised side surface.
• wherein on the raised side surface on the rotating direction side, a projected portion of each branched coolant passage pipe which faces the rotating direction side is provided along a direction from a raised end site toward a leading end at said opposite sides in a direction orthogonal to the longitudinal direction.