Disclosed is an X-ray apparatus with an X-ray tube controller. The X-ray tube controller controls an X-ray tube so as for X-rays emitted from the X-ray tube to have an energy width whose upper limit is more than the minimum K-shell absorption edge of K-shell absorption edges for elements forming a conversion film and is equal to or less than a preset value depending on a K-shell absorption edge corresponding to a characteristic X-ray whose energy influences the blur. Accordingly, the less number of ejected K-shell characteristic X-rays is obtainable than the case when the emitted X-rays have an energy width whose upper limit is more than a preset value depending on the K-shell absorption edge corresponding to the characteristic X-ray whose energy influences the blur. This allows a suppressed blurred image generated from ejected K-shell characteristic X-rays outside a pixel area where X-rays enter to introduce a photoelectric effect.
