PURPOSE:To introduce an X-ray image on an X-ray TV set and two film cameras respectively, by changing an X-ray perspective image for right image or for left image into an optical image, and distributing and introducing said optical image by means of a half mirror which is rotatably disposed on an optical axis. CONSTITUTION:An X-ray image of a body to be tested is focussed on the input surfaces of image intensifiers I.I.3, and said image is changed into an optical image to be introduced into an optical system unit 4. While, the half mirror rotates synchronously with the shutter of cine-cameras 5 and 6, and stops for a while at a position where the cine-camera with the open shutter reflects the image toward the optical axis direction X-ray is radiated thereafter, and the half mirror rotates up to a position where the next cine-camera can reflect an image toward the optical axis direction. The optical image is distributed to each camera by means of the half mirror 4b, and a residual ray which is transmitted through the half mirror 4b is introduced into the TV camera and photographed.