PROBLEM TO BE SOLVED: To provide an X-ray detector that has an anti-theft function, and an X-ray diagnostic apparatus using the same.SOLUTION: The X-ray detector 7 includes: a GPS antenna 20 that receives a radio wave from two or more GPS satellites a GPS receiving section 22 that receives a GPS signal based on the radio wave received by the GPS antenna 20 a position detector 24 that detects the position of itself based on the GPS signal received by the GPS receiving section 22 and a determination section 26 that determines whether the position of itself detected by the position detector 24 is in the inside of a tolerance.COPYRIGHT: (C)2013,JPO&INPIT【課題】盗難防止機能を有したX線検出器、及びそれを用いたX線診断装置を提供する。【解決手段】複数のGPS衛星からの電波を受信するGPSアンテナ20と、GPSアンテナ20により受信された電波に基づいてGPS信号を受信するGPS受信部22と、GPS受信部22によって受信されたGPS信号に基づいて、自己の位置を検出する位置検出部24と、位置検出部24によって検出された自己の位置が許容範囲の内側にあるか否かを判定する判定部26とをX線検出器7に備える。【選択図】図2