An X-ray imaging apparatus and method are provided. The X-ray imaging apparatus according to an aspect includes an X-ray source configured to radiate X-rays onto a subject region, an X-ray detector configured to detect the radiated X-rays and obtain a plurality of frame images of the subject region, and an ROI filter located between the X-ray source and the X-ray detector, configured to move toward the X-ray source and the X-ray detector, and configured to filter the X-rays radiated from the X-ray source.