PURPOSE: To aim at miniaturizing a copying machining device, by providing a guide beam which allows a tracer and a rotary tool to vertically rotate, to a beam which may be moved back and forth on a machine bed, and by constituting a workpiece attaching bed with upper and lower boards which may be moved back and force, and right and left.

CONSTITUTION: A copying device is arranged such that a tracer and a milling arm A, B are attached to a guide beam 5 carried by a beam 4 adapted to move in the Y direction, slidably in the X direction, and the movement in the Z direction may be carried out by the rotation of the guide beam 5 with respect to the beam 4, and further, a workpiece attaching bed for a milling tool (b) is composed of upper and lower boards I , II which are relatively movable in the X, Y directions. Further, by rotational direction change-over devices for lead screws 11, 12 for the arms A, B of the tracer and milling tool, the arms A, B may be rotated in the same direction or the opposite directions so that an article having a same shape, a similar shape or an arbitrarily different shape may be cut and formed. Then, it is arranged such that the workpiece attaching bed D may be moved together with a bed board III on which the boards I , IIare arranged, toward a place below another milling tool, thereby an NC machining process may also be made in an entirely small size device.