Disclosed are an X-ray imaging apparatus and a method for determining a position of a detector. in accordance with an aspect of the present embodiment, an X-ray imaging apparatus includes an input receiving a user command； an X-ray source configured to radiate X-rays onto a subject according to the user command； a plurality of detectors respectively outputting a plurality of images in response to performing an X-ray radiation operation of the X-ray source； a controller configured to determine at least one image among the plurality of images, wherein the at least one image includes an image corresponding to a detector from which the X-ray is estimated to be incident from the plurality of detectors； and a display configured to display the at least one image.
