Patent ID: 6926050

Claim:
A cutting tool holder, for holding a cutting member, which is attached to a drive unit for driving the cutting member, the cutting tool holder comprising: a first elastic member elastically deformable in a first direction; a second elastic member elastically deformable in a second direction different from the first direction; an elastic connection member for elastically connecting the first and second elastic members; a first attachment member disposed in the first elastic member and connected to the drive unit; and a second attachment member, disposed in the second elastic member, for attaching the cutting member, wherein a first highly rigid member, having higher rigidity than that of the first elastic member and the second elastic member, is disposed in parallel with the second elastic member, wherein, when a deformation degree of the second elastic member in the second direction is at least a predetermined amount, the first elastic member is connected to the second attachment member through the first highly rigid member, and wherein, when the deformation degree of the second elastic member in the second direction is less than the predetermined amount, the first elastic member is not connected to the second attachment member through the first highly rigid member, wherein the first highly rigid member is fixed at a proximal end thereof to the elastic connection member, and a predetermined space is set between a distal end of the first highly rigid member and the second attachment member.