An information display device according to the present invention is provided with: an image display unit (108) for displaying an image in accordance with the orientation of a display screen; a terminal attitude detection unit (104) for detecting the attitude of the information display device on the basis of information acquired by an acceleration sensor, angular velocity sensor, and geomagnetism sensor; and a display orientation determination unit (105) for determining changes in the attitude of the information display device and deciding the orientation of the display screen. When the display screen of the information display device is substantially horizontal and it is determined that there is a change in the attitude of the information display device, if the information display device moves by a predetermined angle or more with reference to the orientation of the display screen of the information display device prior to the change in the attitude of the information display device being determined, the display orientation determination unit (105) decides the orientation of the display screen in such a way that the side of the information display device in the direction in which the predetermined angle with said reference direction is equalled or exceeded becomes the top section of the display screen. The image display unit (108) displays the image in accordance with the orientation of the display screen decided by the display orientation determination unit (105).