Display control device

A display ECU is configured to detect, from an image acquired by a camera, a vehicle to be followed that precedes a host vehicle, project a marker image, in the screen display frame, with any one of a display near the vehicle to be followed and a display on the vehicle to be followed in a superimposed manner, and control the AR-HUD such that the marker image exhibits, when the entire vehicle to be followed is in the screen display frame, a first shape in which the marker image is displayed at maximum size, and the marker image exhibits, when the vehicle to be followed deviates from the screen display frame, a second shape in which the marker image deforms in a state of being in contact with the screen display frame according to a position of the vehicle to be followed present outside the screen display frame.