To provide a rotary wire brush device capable of recovering the wear of bristle ends while rotating a wire brush by electrodepositing a composition member of a metal electrode of an electric discharge machining means to each bristle end of the rotary wire brush.

The rotary wire brush device has the following characteristics. One metal electrode is arranged in the middle of a rotation track of the tip of the rotating rotary wire brush and the other electrode is also arranged on a place apart at an interval. The device is provided with the electric discharge machining means which recovers the wear of the bristle ends while rotating the rotary wire brush by electrodepositing the composition member of the metal electrode to each bristle end of the rotary wire brush.