1. An X-ray television system comprising: an X-ray generator to emit X-rays; an X-ray stop for selectively reducing the irradiation field of the X-rays emitted from said X-ray generator; an image intensifier to convert the X-rays transmitted through a subject into an X-ray image; a television camera including an image pickup surface to pick up the X-ray image from said image intensifier and a scanning means for scanning the scanning region of said image pickup surface and converting said X-ray image into a video signal; a means for supplying a scanning signal to the scanning means of said television camera; a means for blanking the video signal from said television camera; a scanning region adjusting means for adjusting the size of the scanning region of said image pickup surface; a means for selecting one of ordinary fluoroscopic photographing and cine-photographing; and a means driving said blanking means in the ordinary fluoroscopic photographing and releasing said blanking means and driving said scanning region adjusting means in a direction to reduce said scanning region in the cine-photographing, in response to said selecting means.