Patent ID: 8306182

Claim:
An X-ray detecting apparatus for detecting X-ray amounts penetrated through an object by irradiating an X-ray beam on the object, the X-ray detecting apparatus comprising: a plurality of detection packs successively arranged in an arrangement direction and configured to detect the X-ray amounts penetrated through the object; a pair of guide rails configured to hold the plurality of detection packs so as to freely move each of the plurality of detection packs in the arrangement direction of the plurality of detection packs; and a fixing unit provided on each of the pair of guide rails to detachably fix the plurality of detection packs so that adjacent edges of the detection packs next to each other contact each other, wherein the fixing unit comprises: a positioning plate provided near to one end of the pair of guide rails for deciding a stop position of the plurality of detection packs held by the pair of guide rails and so as to prohibit movement of the plurality of detection packs in the arrangement direction.