A map display device which scroll-displays a travel route simply scroll-displays a route from a current driving location to a destination on an entire screen. The map display device of the present invention is a map display device which displays a map regarding a travel route of a mobile object, and is configured of: a display unit; a route calculation unit and a map information storage unit which obtain map information concerning a current position of the mobile object and the travel route; a current position detection unit, a current position storage unit and a display area determination unit which allow a map indicated by the obtained map information concerning the current position of the mobile object to be displayed entirely on a display screen; and a partial map display area storage unit and a partial map display position determination unit which display a map indicated by the obtained map information with regard to the travel route of the mobile object on a partial display area which is a part of the display screen, in which the partial map display position determination unit displays, on the partial display area, a partial map which is a map regarding a part of the travel route while allowing the partial map to be scrolled along the travel route.