An image display device for direct drawing apparatus for performing direct drawing comprising: an acquisition part for acquiring design data in a vector format describing the pattern; a specified parameter setting part for setting a specified parameter to be used for RIP development of the design data; a processing area setting part for setting a processing area of the design data to be subjected to RIP development; a display RIP development part for performing RIP development of a portion of the design data, which corresponds to the processing area, by using the specified parameter, to thereby obtain a specified image; and a display part for visibly displaying the specified image, wherein the RIP development performed by the display RIP development part is a display RIP development in which the amount of processed data is smaller than that in drawing RIP development for the direct drawing.