PURPOSE: To provide a marking device with a CAD in which the image of a work is fetched to the CAD as a marking pattern, and a marking character and pattern are combined and formed with the pattern on a display unit to form a processing program with high productivity.

CONSTITUTION: Since the image of a work 1 is displayed on the display unit 4N of a CAD 40 as a marking pattern, a screen is monitored to regulate the disposition of the work 1. Since the reduction scale ratio of the image of the work 1 is displayed on the unit 4N, the marking character and pattern of arbitrary reduction scale can be combined and formed to match the marking pattern of the work 1.