A group of images of the inside of a body under test, which are imaged by a plurality of imaging elements, can be displayed to be easily observed. An image display apparatus (4) comprises a display (12), a setting GUI, and a controller (16). The display (12) displays each image included in each of a first image group (PG1) and a second image group (PG2) from among a plurality of image groups of the inside of a body under test, which are imaged by a plurality of imaging elements mounted on a capsule-type endoscope with multiple eyes. The setting GUI is displayed on the display (12) and is usedfor setting a synchronous display mode for synchronously displaying a first image included in the first image group (PG1) and a second image included in the second image group (PG2), in which a subject common to the first image is imaged, in the respective display areas of the display (12). When the synchronous display mode is set by this setting GUI, the controller (16) performs control so that these first and second images are synchronously displayed in the respective display areas of the display (12).
