An image display apparatus, that displays a digital image on a screen for check use, includes: an image data storage unit that stores image data of the digital image; an edge detection unit that detects an edge included in the digital image through analysis of the image data; and an image display unit that displays, when the edge being a detection result has a width wider than a predetermined first threshold width, the digital image in a state that the width of the edge is visible on the check screen.