To provide an image processor for suppressing the malfunction of image processing based on instruction information plotted on a recording sheet.

The image processor includes: an image read control part 581 for making the image reader optically read plotted contents on the recording sheet; a display control part 585 for making a display device display the instruction information to the recording sheet corresponding to a read result; and a print control part 125 for executing the instruction information when receiving a confirmation result indicating that the instruction information is not erroneous from an input device. Further, the image processor is provided with a recognition correctness confirmation part 588 for judging the correctness of the instruction information based on the read result, and the print control part 125 stops the execution of the instruction information when judging that a judged result is erroneous.