Abstract: A cutting tool includes a body, a blade, and a position adjustment screw. The body surrounds an axial line. The blade includes a cutting edge portion and a shank portion. The position adjustment screw is in contact with the shank portion. The position adjustment screw includes a head portion in contact with the shank portion and a joint portion continuous to the head portion and joined to the body. The head portion includes a tip end surface in contact with the shank portion, a connection surface continuous to the joint portion, and an outer circumferential surface continuous to each of the tip end surface and the connection surface. When viewed in a direction perpendicular to the axial line, a part of the outer circumferential surface is exposed through the second hole and a remainder of the outer circumferential surface is covered with the body.

Abstract: A cutting tool has a main body and a cutter. The main body has an outer peripheral surface having one end and the other end. The cutter is fixed to the main body. The main body is provided with a hole extending in a direction from a region surrounded by one end toward a region surrounded by the other end. When viewed from this direction, the shape of the opening of the hole is circular, and the hole is provided inner than the outer peripheral surface. The cutter has a member disposed inside the hole.