A display control apparatus comprising: an image data acquisition unit configured to acquire image data from a rear camera configured to shoot a rear view of a vehicle; a display image generation unit configured to generate display image data in which a pair of predicted course lines and a plurality of assisting lines are superimposed on the image data acquired by the image data acquisition unit , the pair of predicted course lines corresponding to a width of the vehicle and being drawn according to a backward movement of the vehicle, the plurality of assisting lines being disposed so that they are arranged side by side in a width direction on both sides of the pair of predicted course lines ; an extraction unit configured to extract a marked-off space boundary from the image data, the marked-off space boundary being a boundary in a width direction of a marked-off parking space where the vehicle can be parked; a positional relation determination unit configured to determine a positional relation between the marked-off space boundary extracted by the extraction unit and the assisting line in the display image data; a display control unit configured to display an image based on the display image data generated by the display image generation unit in a display unit , wherein the display image generation unit changes a displaying format of an assisting line located on an outer side of the marked-off space boundary extracted by the extraction unit from a displaying format of an assisting line located on an inner side of the marked-off space boundary; and wherein the display image generation unit generates the display image data in which an assisting line closer to the predicted course line is superimposed on the image data in a more noticeable displaying format. an image data acquisition unit configured to acquire image data from a rear camera configured to shoot a rear view of a vehicle; a display image generation unit configured to generate display image data in which a pair of predicted course lines and a plurality of assisting lines are superimposed on the image data acquired by the image data acquisition unit , the pair of predicted course lines corresponding to a width of the vehicle and being drawn according to a backward movement of the vehicle, the plurality of assisting lines being disposed so that they are arranged side by side in a width direction on both sides of the pair of predicted course lines ; an extraction unit configured to extract a marked-off space boundary from the image data, the marked-off space boundary being a boundary in a width direction of a marked-off parking space where the vehicle can be parked; a positional relation determination unit configured to determine a positional relation between the marked-off space boundary extracted by the extraction unit and the assisting line in the display image data; a display control unit configured to display an image based on the display image data generated by the display image generation unit in a display unit , wherein the display image generation unit changes a displaying format of an assisting line located on an outer side of the marked-off space boundary extracted by the extraction unit from a displaying format of an assisting line located on an inner side of the marked-off space boundary; and wherein the display image generation unit generates the display image data in which an assisting line closer to the predicted course line is superimposed on the image data in a more noticeable displaying format. <EOS>