An information display device that displays information including information display related to a route along which a vehicle is to travel as a virtual image in a display area, the display device comprising a controller (600, 902) configured to alter properties and characteristics of the information display being displayed in the display area, wherein the controller (600, 902) alters the properties and characteristics of the information display at a timing determined in advance, and the controller (600, 902) alters the properties and characteristics of the information display at a timing when information about the route is input from a device in which the route is set and position information of the vehicle is obtained, wherein the controller (600, 902) alters the properties and characteristics of the information display at an at least one update when distance to a next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line with reference to a position of the vehicle on the route or an estimated length of time required to reach the next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line with reference to the position of the vehicle is updated in the device, and wherein at least when the at least one update is not a last update, the controller (600, 902) alters the properties and characteristics of the information display to enhance visual excitability at the at least one update, compared with before and after the at least one update, the information display device is characterised in that after the information display indicating the direction of a next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line, the name of a place or the remaining distance to a next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line, is displayed so as to strengthen the visual excitability on a temporary basis at the at least one update, the information display is displayed so as to weaken the visual excitability on a continual basis after the at least one update. a controller (600, 902) configured to alter properties and characteristics of the information display being displayed in the display area, wherein the controller (600, 902) alters the properties and characteristics of the information display at a timing determined in advance, and the controller (600, 902) alters the properties and characteristics of the information display at a timing when information about the route is input from a device in which the route is set and position information of the vehicle is obtained, wherein the controller (600, 902) alters the properties and characteristics of the information display at an at least one update when distance to a next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line with reference to a position of the vehicle on the route or an estimated length of time required to reach the next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line with reference to the position of the vehicle is updated in the device, and wherein at least when the at least one update is not a last update, the controller (600, 902) alters the properties and characteristics of the information display to enhance visual excitability at the at least one update, compared with before and after the at least one update, the information display device is characterised in that after the information display indicating the direction of a next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line, the name of a place or the remaining distance to a next point at which the vehicle should turn on the scheduled route with reference to a path of a straight line, is displayed so as to strengthen the visual excitability on a temporary basis at the at least one update, the information display is displayed so as to weaken the visual excitability on a continual basis after the at least one update.