An image display apparatus comprising: a display control means that obtains a tomogram from each of two or more image groups each including a series of tomograms, and between which tomograms are related to each other, and that displays the obtained tomograms arranged on a display screen; and an input operation receiving means that receives, in at least one of a plurality of display areas on the display screen in which the tomograms are displayed by the display control means, an input operation that gives an instruction to switch the tomogram displayed in the at least one of the plurality of display areas, characterised in that the display control means sets a linked switching partial area and a non-linked switching partial area in the at least one of the plurality of display areas in which the input operation is to be received by the input operation receiving means, and wherein when the input operation received by the input operation receiving means has been performed in the non-linked switching partial area, the display control means switches only the tomogram displayed in the display area in which the input operation has been performed to a tomogram succeeded by or succeeding the displayed tomogram in the same image group, and wherein when the input operation received by the input operation receiving means has been performed in the linked switching partial area, the display control means switches the tomogram displayed in the display area in which the input operation has been performed to the tomogram succeeded by or succeeding the displayed tomogram in the same image group and also switches the tomogram displayed in each of the other display area or areas to a tomogram that is included in the same image group as the tomogram displayed in each of the other display area or areas and related to the tomogram displayed after switching in the display area in which the input operation has been performed. a display control means that obtains a tomogram from each of two or more image groups each including a series of tomograms, and between which tomograms are related to each other, and that displays the obtained tomograms arranged on a display screen; and an input operation receiving means that receives, in at least one of a plurality of display areas on the display screen in which the tomograms are displayed by the display control means, an input operation that gives an instruction to switch the tomogram displayed in the at least one of the plurality of display areas, characterised in that the display control means sets a linked switching partial area and a non-linked switching partial area in the at least one of the plurality of display areas in which the input operation is to be received by the input operation receiving means, and wherein when the input operation received by the input operation receiving means has been performed in the non-linked switching partial area, the display control means switches only the tomogram displayed in the display area in which the input operation has been performed to a tomogram succeeded by or succeeding the displayed tomogram in the same image group, and wherein when the input operation received by the input operation receiving means has been performed in the linked switching partial area, the display control means switches the tomogram displayed in the display area in which the input operation has been performed to the tomogram succeeded by or succeeding the displayed tomogram in the same image group and also switches the tomogram displayed in each of the other display area or areas to a tomogram that is included in the same image group as the tomogram displayed in each of the other display area or areas and related to the tomogram displayed after switching in the display area in which the input operation has been performed.