PROBLEM TO BE SOLVED: To generate and display artificial valve indwelling support data effective for artificial valve replacement.SOLUTION: An X-ray diagnostic apparatus 100 includes: a transparent image data generation part 61 for generating first transparent image data during initial artificial valve indwelling and second transparent image data during a second time artificial valve indwelling, based on projection data acquired by X-ray fluoroscopic photographing for a patient who needs artificial valve replacement a waveform determination part 12 for determining normality/abnormality of an electrocardiographic waveform acquired from the patient during initial artificial valve indwelling a support data generation part 65 for generating artificial valve indwelling support data by superposing artificial valve image information shown in the first transparent image data on the second transparent image data generated during a second time artificial valve indwelling conducted when it is determined by the waveform determination part 12 that the electrocardiographic waveform is abnormal and a display part 7 for displaying the artificial valve indwelling support data.
