According to one embodiment, an X-ray diagnostic apparatus includes an X-ray tube which generates an X-ray, an X-ray detector which detects an X-ray generated by the X-ray tube, a support frame which supports the X-ray tube and the X-ray detector pivotally with respect to a plurality of movable axes, a storage which stores angular information represented by rotation angles about the movable axes, the angular information relates to at least one preset posture of the support frame, and a display which displays at least one first angle mark corresponding to the at least one posture on a clinical angle map represented by a coordinate system based on the movable axes defining a posture of the support frame.
