The invention provides a power tool which includes a tool bit, a first
operating mechanism that linearly drives the tool bit and thereby causes
the tool bit to perform a predetermined operation, and a dynamic
vibration reducer 151 that reduces vibration in the operation of the tool
bit. The dynamic vibration reducer includes a weight 153 that can
linearly move under the action of biasing forces of a plurality of
biasing springs 157 acting upon the weight 153 toward each other. The
weight 153 is driven by a second operating mechanism 116 that
mechanically excites at least one of the elastic elements, via the
elastic element.