An imaging region adjustment device includes plural camera terminals, capable of imaging an entire imaging target without blinds spots. Each of the camera terminals includes a camera which images a virtual imaging region obtained while changing the position of an imaging region within a specific region in a specific period of time and an adjusting unit B which adjusts the position of the virtual imaging region by controlling the camera. The adjusting unit B adjusts the position and aspect ratio of the virtual imaging region of one's own camera terminal so that a combined region of the virtual imaging regions of the camera terminals completely covers a specific imaging target region, based on the virtual imaging region of one's own camera terminal and virtual imaging regions of the other camera terminals, and when the virtual imaging regions A of N other camera terminals are contained in the virtual imaging region of one's own camera terminal, divides the virtual imaging region of one's own camera terminal into N+1 regions.