To provide an effective technique, for a working tool which contains a dynamic vibration absorber, to achieve rational placement of the dynamic vibration absorber within a tool body.

A hammer drill embodied as the working tool has the dynamic vibration absorber 151 placed within an internal space 110, which is located on a motion converting section 113 side of a driving motor 111 within the tool body 103, and whose inner and outer sides are defined by an outer edge of the motion converting section 113 and by the contour of the driving motor 111, respectively.