Abstract: Provided is an X-ray inspector capable of non-destructively measuring a shape and content of gold (Au) contained in an object to be inspected, promptly with high accuracy. An X-ray inspector includes: an X-ray generator that irradiates an object to be inspected with X-rays having energy of 90 keV or higher; X-ray detector that detects the X-rays transmitted through the object to be inspected; a computing section that measures a shape and content of Au contained in the object to be inspected based on an X-ray signal detected by the X-ray detector, wherein an Au filter and a Pt filter are respectively provided between the X-ray detector and the object to be inspected. The X-ray detector detects X-rays emitted from the X-ray generator and transmitted through the object to be inspected and the Au filter and X-rays emitted from the X-ray generator and transmitted through the object to be inspected and the Pt filter.