An image display device (1) of the present invention is an image display device having a function of rotating a display image, the image display device including: a size comparison section (17) for making a comparison (i) between a vertical length of an outer edge of a display region in which the display image is displayed and a vertical length of the display image and (ii) between a horizontal length of the outer edge of the display region in which the display image is displayed and a horizontal length of the display image; and a center-point-of-rotation determination section (18) for determining a center point of rotation of the display image in accordance with a result of the comparison made by the size comparison section (17). This makes it possible to provide a display device (i) which minimizes, regardless of how a display frame and a display image are related in position and size to each other, a portion of the display image which portion is to be hidden when the display image has been rotated and (ii) which can be easily employed in a rotation process.