A display control device is used in a vehicle to control a display of a head-up display The display control device acquires external information based on recognition of a traveling environment around the vehicle, and causes the head-up display to display a superimposition content for providing a route guidance to be superimposed on a foreground in a guidance area. Further, the display control device causes the head-up display to end a display of the superimposition content at a timing based on an end determination using at least the external information.