A warning control device is provided with a detection device for detecting a mobile body moving in a direction intersecting with the path of the host vehicle. The warning control device performs a warning operation when the host vehicle and the mobile body approach each other. The warning control device calculates the intersecting distance, which is the distance to the host vehicle from a predicted intersecting position between the path of the host vehicle and the path of the mobile body. The shorter the calculated intersecting distance, the earlier becomes the timing of the warning operation executed by the warning control device.