To provide a
tool holder that is capable of exerting a vibration-minimizing effect in a reliable manner using a simple configuration and that is extremely useful for practical application. A
tool holder comprising a vibration-minimizing part for minimizing vibration generated in a tool (1) when the tool (1) is used to perform
machining, the vibration-minimizing part being provided, on a distal-end side, with tool-holding means for detachably securing the tool (1) and provided, on a proximal-end side, with a shank part (2) to be mounted on a spindle of a
machine tool; wherein a plurality of reinforcing parts (4) extending in an axial direction of the
tool holder (3) are provided to a
peripheral section of the tool holder (3) in a radial direction; accommodating recesses (6) for accommodating a vibration-damping material (5) are provided between the reinforcing parts (4); the vibration-damping material (5) is accommodated in the accommodating recesses (6); and the vibration-damping material (5) and the reinforcing parts (4) form the vibration-minimizing part.