PURPOSE: To facilitate operation by rotatably bearing a cutter rotor by a bearing frame connected to the turning section of a connecting frame while a cut-surface pusher is disposed on the side of the cutter rotor in a freely vertically movable manner.

CONSTITUTION: The hanging sections 11a, 11b of a connecting frame 1 are mounted to the front end of the rotatable arm A1 of a construction equipment and an air cylinder C. When a cutter rotor 3 is revolved by a rotary driving gear 5, the surface of a road, etc., is cut by the cutting pawls 31 of the cutter rotor 3. The pushing section 41 of a cut-surface pusher 4 is moved vertically by a hydraulic cylinder 43 and abutted against the surface of the road, etc., and the road, etc., are cut in specified cutting depth.