A display control device for controlling a display device displaying a driver support image to have an overlap with a view from a driver seat in a vehicle or a live-action video in front of the vehicle, the display control device includes: a video signal generation unit generating a video signal for displaying a driver support image to have an overlap with the travelable traffic lane, and a video signal output unit. The driver support image having the overlap with the travelable traffic lane has a width in a width direction of the traffic lane and extends in a direction in which the traffic lane extends. The driver support image having the overlap with the region other than the travelable traffic lane is an image in which the travelable traffic lane can be distinguished according to a width and a length.