The present invention relates to an X ray imaging apparatus including an X ray source a grating that divides diverging X rays irradiated from the X ray source and a detector that detects X rays which are divided by the grating and pass through a sample. The grating includes a plurality of transparent objects which pass the diverging X rays and a plurality of opaque objects that shield the diverging X rays. A focused position at which a plurality of extended lines intersect each other and the X ray source are arranged in different position. The extended lines are formed by extending center lines which connect a center of the X ray source side of each of the plurality of opaque objects facing the X ray source with a center of the detector side of each of the plurality of opaque objects facing the detector.
