To provide a polishing device for facilitating connection work of a wire by making a remote work tool available thereby polishing an object at a remote position without deforming the object, especially polishing the object without deforming the core of a wire.

A set of two polishing devices 10 and 20 attached, respectively, to the distal ends of the immobile member 111 and the movable member 112 at the grip portion 110 of a plyer 100 has a fixing portion 30 being fixed removably to the distal end of the plyer, and a brush 43 arranged on the footprint 42 of the fixing portion and bonded to the opposing surface which touches the brush and separates therefrom through operation of the plyer.