An X-ray imaging apparatus including: an imaging unit which includes an X-ray tube that emits an X-ray to a subject and an X-ray detector that is so disposed as to face the X-ray tube an input unit which inputs a plurality of imaging conditions including a tube current and a tube voltage of the X-ray tube, and sets an imaging protocol of the imaging unit and an image creation unit which calculates an exposed dose when at least the tube voltage or the tube current is varied, and creates an index image that is made by overlapping an image showing the exposed dose on a two-dimensional map that is represented by the tube voltage and the tube current.
