A display control device includes: an illuminance acquisition unit configured to acquire surrounding illuminance of a display unit on the basis of one or both of first illuminance detected by a first illuminance sensor and second illuminance detected by a second illuminance sensor; a storage unit configured to store correspondence information in which illuminance is associated with target luminance; a luminance control unit configured to control luminance of a screen of the display unit on the basis of the acquired illuminance and the correspondence information; and an abnormality detection unit configured to detect an abnormality of at least the first illuminance sensor. The luminance control unit acquires the target luminance associated with the surrounding illuminance of the display unit from the correspondence information on the basis of the surrounding illuminance when the abnormality of the first illuminance sensor is not detected. The luminance control unit acquires the target luminance on the basis of information in which one or both of the second illuminance and the correspondence information is corrected and performs control such that the luminance of the screen of the display unit becomes the target luminance when the abnormality of the first illuminance sensor is detected.