To provide a vibration isolating tool which has a high chatter preventing effect and simple structure.

In the vibration isolating tool which has a deadweight elastically supported in a hollow portion of a tool main body, the tool main body 1 has a front end 2 on which a cutting blade is mounted, the hollow portion 3, an almost spherical elastomer 4, and the almost cylindrical deadweight 5. The deadweight 5 is elastically supported in the axially extending hollow portion 3 via the spherical elastomer 4. The deadweight 5 is made of a metal having a mass density of 14 g/cm3 or more.