A display input device is comprised of a touch panel 1 for carrying out a display of information and an input of information, a vibration detection sensor (proximity sensors 12 or an acceleration sensor 23) for detecting a vibration of an object to be detected which is positioned opposite to the touch panel 1, and a control unit 3 for, when it is determined that a relative vibration between the touch panel and the object to be detected, which is detected by the vibration detection sensor, has an amount equal to or larger than a predetermined amount, carrying out a process of enlarging an image in a display area having a fixed range, which is displayed on the touch panel 1, to display the enlarged image.