To provide a technique for enabling a tip tool to be held in a work tool with a simple configuration.

An electric vibration tool having an outer flange 130 which can be attached to and detached from a clamp head 123 formed at a clamp shaft 122 is configured. The clamp shaft 122 is configured so as to be able to move in a long axis direction according to a clamp position and a release position where a cam lever is positioned. When the cam lever is positioned at the release position, the outer flange 130 is linearly moved in a direction that intersects with the long axis direction of the clamp shaft 122 with respect to the clamp shaft 122, is engaged with the clamp head 123, and is positioned and fixed. When the cam lever is positioned at the clamp position, by a biasing force of a coil spring, a clamp force is caused between the outer flange 130 and a spindle, and a blade is held by the clamp shaft 122 by the clamp force.