An X-ray imaging apparatus includes an X-ray irradiation element, an X-ray detection element, an X-ray image generation element, and an image processing analysis element. The image processing analysis element reflects the analysis point on each frame based on a respective relative location between a characteristic point 10 of the X-ray image consisting of a plurality of frames. In addition, an image analysis element analyzes the time-course variation of the blood flow in the blood vessel of the heart based on the variation of the pixel value at the analysis point of each frame of the X-ray image.