The present invention provides an image displaying device including: a display section that displays a pair of mutually related sectional images； a reception section that, for one of the sectional image pair, receives a successive change instruction for a slice position； a generation section that generates a combined sectional image, corresponding to the slice position of the one sectional image, from the other sectional image of the pair； and a controller that, in cases in which the reception section has received the successive change instruction, effects control to switch display of the one sectional image from the one sectional image being displayed to the one sectional image that corresponds to the slice position indicated in the instruction, and, in conjunction with switching, to successively switch display of the other sectional image from the other sectional image that is being displayed to the combined sectional image.
