Vibration damping tool

A vibration damping tool having the following structure is provided. In the vibration damping tool, a hollow portion is formed in the interior of the distal end portion of a tool body and one end of a weight member is connected to the inner wall surface of the distal end side of this hollow portion. A gap created between the outer peripheral surface of the weight member and the inner wall surface of the hollow portion is filled with a visco-elastic body. The one end of the weight member is formed as a narrow diameter shaft portion. The tool body can be divided into two and freely removed from and reattached at a dividing surface located on the base end side of the hollow portion. A hole portion is formed inside the other end of the weight member by hollowing out the interior thereof. Chatter vibration is thus absorbed using a simple structure without there being any effects from heat generated during cutting processing.