An X-ray diagnostic apparatus comprises an X-ray detector including a first detector and a second detector capable of simultaneously detecting X-rays irradiated from an X-ray tube, and processing circuitry configured to, when displaying one of a first image based on output from the first detector and a second image based on output from the second detector on a display, display the other one of the first image and the second image corresponding to a partial region of the one of the first image and the second image.
