1. A vehicle surrounding-area monitoring apparatus comprising: a notable video image generator generating a narrow view-field region as a notable video image, the narrow view-field region being part of a video image of an area surrounding a vehicle obtained by an imaging unit; an obstacle recognizer recognizing an obstacle in the area surrounding the vehicle; an obstacle region calculator calculating an obstacle region, the obstacle region being a region, in the video image, of the obstacle recognized by the obstacle recognizer; an overlapping region calculator calculating an overlapping region, the overlapping region being a region, in the video image, extending into the narrow view-field region from a direction of the obstacle region; a notable obstacle image generator generating a notable obstacle image comprising the obstacle region and the overlapping region, if the obstacle region is contained in an image region that is partially overlapping with the narrow view-field region and is a part of the video image; and an image merger generating a surrounding-area monitoring display image comprising the notable video image and the notable obstacle image.