An image display apparatus and an image display program includes image acquiring section which acquires cross-section image groups which include cross-section images on cut positions arranged in a predetermined direction of a subject, a place setting section which sets places on the cross-section images in the cross-section image groups, an image group extracting section which extracts a series of image groups which continue along the cross-section images and include the image on the places from the cross-section image groups, a cut position calculating section which calculates cut positions whose positional feature in the respective image groups is common among the image groups, on the image groups, and an image display section which arranges to display cross-section images in the cross-section image groups.