Abstract: A combination milling bit and cutter employed to machine a distal end of a workpiece is provided, in which the milling cutter includes a handle and a cutting portion formed on an end of the handle. The cutting portion includes two cutting edges; at least one of the two cutting edges comprises one cutting sub-edge for milling the distal end of the workpiece to form an end surface, and another cutting sub-edge for chamfering the distal end of the workpiece at both an annular outer chamfering surface and an annular inner chamfering surface on the distal end. The combination milling and cutting cutter device carries out both milling and cutting actions in a single operation.