<p>An objective of the present invention is to provide an information input device with which it is possible to track an object to be detected, change a projection location of an input image, and detect an information input to the input image. An information input device comprises: a projection unit which projects an input image; a projection location change unit which changes a projection location of the input image; a detection sensor which detects a location of an object to be detected; and an information detection unit which tracks the location of the object to be detected which has been detected by the detection sensor, makes the projection location change unit change the projection location of the input image, and detects an information input to the input image on the basis of data from the sensing sensor.</p>
