To provide precise CT values without being effected by fluctuation in irradiation X-ray intensity in X-ray diagnostic equipment imaging a CT image using a conical X-ray beam.

This X-ray diagnostic equipment is formed by mounting an X-ray tube 21, an X-ray diaphragm device 22 and a transmissive dosimeter 23 on one end of a C-type arm 25 and an FPD (Flat Panel Detector) 24 on the other end respectively, rotates the C-type arm 25 along its arc to rotate the X-ray tube 21 and the FPD 24 or others around a subject 10, allows a data collection device 35 to collect data obtained from the FPD 24 in respective angles during the rotation, allows the data collection device 35 to collect data of the irradiation X-ray intensity obtained by the transmissive dosimeter 23, allows an image reconfiguration device 34 to reconfigure the CT image with the precise CT values from these data, and displays the CT image on an image monitor device 31.