An X-ray Talbot capturing apparatus is shown. A radiation source irradiates radiation through a plurality of gratings. A radiation detector captures a moire image. A holder which holds the gratings includes a receiving unit including a receiving surface with a curve and a pressing unit including a pressing surface with a curve. Each grating is held between the receiving surface and the pressing surface and bent in an arc shape with a point of the radiation source as a center. An elastic member is positioned between a first surface of the grating and the pressing surface or a second surface of the grating opposite of the first surface and the receiving surface. An opening is provided in the holder and the elastic member so as not to block radiation irradiated on the grating.