PURPOSE: To respectively independently select and project the video images of plural remote image pickup cameras on plural monitor televisions just with one video channel.

CONSTITUTION: This device is provided with the plural image pickup cameras A1,...An for picking up the images of monitoring areas and outputting video signals, a video signal synthesis means G for successively cyclically extracting the respective video images from the plural image pickup cameras by a frame unit, turning them to synthetic video signals and outputting them, a video selection means H for selectively turning the video images from the same image pickup camera among the synthetic video signals to the video signals and outputting them, the monitor television E for projecting the video signals from the video selection means H and a video selection operation part F for giving instructions to the video selection means. Also, the video signal synthesis means G is provided with a mixing means for superimposing image pickup camera identification codes for discriminating the image pickup camera which picked up the images on the respective video signals from the plural image pickup cameras A1,...An.