A field watch apparatus for use in a subject vehicle acquires a road image from a roadside capture unit located around the subject vehicle on a road and, based on the acquired image, generates an overhead view of a field around the subject vehicle in an intuitively recognizable manner by including a distant surrounding vehicle in the view, thereby providing a precisely understandable view of the field around the subject vehicle for the ease of satisfactorily identifying the distant surrounding vehicle without being compromised by the position of the roadside capture unit.