The x-ray diagnostic device which can grasp the state of the defective element of the x-ray plane surface detector appropriately is offered. The defective pixel detection expedient 26 which detects the defective pixel which from pixel information of the x-ray graphics data corresponds to the defective element of x-ray plane surface detector 14 the image processing expedient 24 image processing the x-ray generator 10 which possesses the x-ray tube and x-ray generator from the x-ray plane surface detector on the basis of the x-ray graphics data which reads out 14 which 10 and it is opposed is arranged and x-ray plane surface detector 14 and the said picture in the x-ray diagnostic device which has with the indicatory expedient 34 which indicates the x-ray picture or the transparent image which was processed, and, on the basis of the defective pixel and the defective pixel around that which are detected, lump extent of the defective element of x-ray plane surface detector 14It detects, whether or not the x-ray plane surface detector abnormality it has with the abnormal judgment expedient 32 which judges.X線平面検出器の欠陥素子の状態を適切に把握できるX線診断装置を提供する。X線管を有したX線発生器10と、X線発生器10と対向配置されたX線平面検出器14と、X線平面検出器14から読み出されたX線画像データに基づいて画像処理を行う画像処理手段24と、該画像処理したX線画像又は透視画像を表示する表示手段34とを備えたX線診断装置において、X線画像データの画素情報からX線平面検出器14の欠陥素子に対応する欠陥画素を検出する欠陥画素検出手段26と、検出された欠陥画素とその周囲の欠陥画素に基づいて、X線平面検出器14の欠陥素子の塊度合いを検出し、X線平面検出器が異常か否かを判断する異常判断手段32とを備える。
