According to one embodiment, an X-ray diagnosis apparatus includes a couch where a subject is placed, a projector, a display controller, and a system controller. The projector includes an X-ray tube having a cathode and an anode that receives electrons from the cathode and irradiates X-rays to the subject, and a first detector configured to detect X-rays that have passed through the subject and are incident on the detection surface. The display controller displays a first image generated based on first detection data from the projector on a display. Having received an enlargement instruction to display an enlarged image of part of the subject illustrated in the first image, the system controller controls the display controller to display a second image generated based on second detection data obtained by detecting X-rays incident on the partial detection surface corresponding to the anode side in the detection surface as the enlarged image.
