An object of the present invention is to be able to output moving image data that enables a desired image group partially included in all intra-subject images to be played as a moving image. An image display apparatus according to the present invention includes an image display function of displaying a series of images obtained by picking up an interior of a digestive canal of a subject at time series, and includes an input unit 11, an image extracting unit 16e, and an image file generator 16b. The input unit 11 inputs image designation information for designating one or more central images from among the series of images. The image extracting unit 16e extracts one or more partial image groups in which the central images designated by the image designation information are arranged at respective centers, from the series of images. The image file generator 16b generates a normal moving image including the one or more partial image groups extracted by the image extracting unit 16e, based on the one or more partial image groups.
