Cutting tool and cutting processing device

A cutting tool rotatable about an axis line, the cutting tool comprising:

• a main body having an inner circumferential surface and an outer circumferential surface opposite to the inner circumferential surface;
• a cutting insert attached to one of the inner circumferential surface and the outer circumferential surface;
• and
• a plurality of anti-vibration members provided at the main body,
• wherein
• each of the plurality of anti-vibration members includes a weight member composed of a material having a specific gravity larger than a specific gravity of a material of the main body,
• the main body is provided with a plurality of hollow portions each defined by a respective inner wall surface,
• each weight member is disposed in a respective hollow portion of the plurality of hollow portions with each weight member being separated from the respective inner wall surface,
• each weight member is provided with a through hole,
• each of the plurality of anti-vibration members includes
• a pin member that extends through the through hole and that is directly attached to the respective inner wall surface, and
• at least one elastic member that surrounds the pin member and that is in contact with each weight member in the through hole, and
• a longitudinal direction of the pin member is a radial direction of the main body.