A stereo X-ray fluorography apparatus includes a stereo X-ray tube having right and left focal points for irradiating a subject, in alternate fashion, with X-rays, a television camera for picking-up right and left images, resulting from the X-rays emitted from the right and left focal points, after the passage of the X-rays through the subject, a television monitor for alternately displaying the right and left images picked-up by the television camera, and a pair of glasses for allowing light to be alternately transmitted and not transmitted, repetitively and in synchronism with the switching of the displaying of the right and left images on the television monitor. For the television monitor, use is made of a double-rate (120 fields per second) type. The images are picked-up by the television camera, upon the subject being irradiated with X-rays from the stereo X-ray tube, for every two fields of the television camera. The picked-up images are stored in frame memories, in synchronism with the X-ray irradiation, and the right and left field images are alternately read out from the frame memories for each 1/2 field period of the TV camera, four times for the respective image, and transmitted to the double-rate television monitor.