1. A print inspection device which inspects a state of a print for a printer including a printhead group having a plurality of printheads, the print being printed by causing each printhead to deliver ink to printing paper, the print inspection device comprising: an image reader including a reader element array disposed in such a way that a scanning width of the reader element array is greater than a width of the printhead group in the group's primary scanning direction, the image reader reading an image printed on the printing paper by scanning the printing paper in a secondary scanning direction of the printhead group; and an image processor for inspection of the state of the print printed by the printer, based on image data which represent the image read by the image reader.