A display control device includes: an acquirer that receives inclination information on an occupant's head in a mobile body from a detector; and a controller that controls a displayer to generate a predetermined image representing a presentation image superimposed on an object as viewed from the occupant, based on recognition results of the object and the inclination information. When the object is recognized, with the head not inclined, the controller causes the displayer to generate a first predetermined image representing a first presentation image including one or more first lines in which a line segment connecting both ends is horizontal, or with the head inclined, the controller causes the displayer to generate a second predetermined image representing a second presentation image including a second line which is obtained by inclining at least one of the first lines by an angle according to the inclination of the occupant's head.