1. A drive support display device supporting a drive of a self-vehicle based on a detection result by an object detector regarding a nearby area of the self-vehicle, the device comprising: a receiver that receives object information from an external source, the object information identifying a nearby object existing in the nearby area of the self-vehicle; a determination section in a processor, the determination section determining whether the nearby object is defected by the object detector; and a display section in the processor the display section providing a warning indicator when the determination section determines that the nearby object is an undetected nearby object that is not detected by the object detector.