To provide an excellent technology concerning to the attachment/detachment of a clamp member holding a tip tool.

The electric vibratory tool 100 has a spindle 120, a clamp shaft 123 capable of being mounted to and removed from the spindle 120, and a clamp shaft holding member 130 disposed between the spindle 120 and the clamp shaft 123 and affixing the clamp shaft 123 to the spindle 120 by being screwed to the clamp shaft 123. The electric vibratory tool 100 drives a blade 200 held by the spindle 120 by the clamping action of the clamp shaft 123. The clamp shaft holding member is configured so that the clamp shaft holding member 130 can rotate relative to the spindle 120, and the relative rotation of the clamp shaft holding member 130 permits the removal of the clamp shaft 123.