1. An image display control device comprising: a thumbnail image display control unit that displays a thumbnail image of a tomographic image forming a three-dimensional image including a plurality of tomographic images; a display instruction receiving unit that receives an instruction to display the three-dimensional image; and a tomographic image display control unit that displays the plurality of tomographic images forming the three-dimensional image on a display screen which is different from a display screen on which the thumbnail image is displayed such that the tomographic images are sequentially switchable, when the display instruction receiving unit receives the instruction to display the three-dimensional image, wherein the thumbnail image display control unit newly generates a thumbnail image of the tomographic image displayed by the tomographic image display control unit immediately before the display of the tomographic image ends, changes the thumbnail image that is currently being displayed to the newly generated thumbnail image, and displays the newly generated thumbnail image.