1. An image checking device that checks a printed image printed out on a printing medium by an image forming device and read by an image reading device, the image forming device including an attribute-information storage unit that stores therein attribute information about the printing medium, the image checking device comprising: a data acquiring unit that acquires checking-image data that is read by and output from the image reading device, original reference image data that is input to the image forming device, and, from the attribute-information storage unit, attribute information about a printing medium on which an image is printed; a correction-parameter storage unit that stores therein a correction parameter corresponding to the attribute information; an image generating unit that reads, from the correction-parameter storage unit, a correction parameter corresponding to the attribute information acquired by the data acquiring unit, corrects the original reference image data by using the correction parameter, and generates corrected reference image data; and an image checking unit that compares the checking-image data with the corrected reference image data by using a pre-set value so as to determine the degree of matching between the checking-image data and the corrected reference image data, thereby performing image checking on the printed image.