When the suffering inspection body moved while seeing through even, the x-ray image diagnostic device which obtains appropriate perspective x-ray output condition, x-ray exposure control manner, and in order to offer the program, as for the x-ray image diagnostic device, the x-ray generation means detecting the transmitted x-ray which transmitted 1 which generate the x-ray and the suffering inspection body, in the x-ray detection means the area of interest configuration means 7 which configurate the multiple areas of interest on the x-ray intensity distribution image which is based 2 which output the graphics data which shows the x-ray strength of that transmitted x-ray and the aforementioned graphics data and, the collimating mark which shows the x-ray strength of each area of interestThe x-ray exposure control means 5 which control the exposure of x-ray generation means 1 the x-ray strength calculation means the x-ray strength choice means 9 which choose one central value from midst of central value of x-ray strength of 8 which calculate central value and the aforementioned multiple areas of interest and aforementioned on the basis of the central value of the x-ray strength which is chosen, and, it has.透視中に被検体が動いた場合にも、適切な透視X線出力条件を得るX線画像診断装置、X線露出制御方法、及びプログラムを提供するために、X線画像診断装置は、X線を発生させるX線発生手段1と、被検体を透過した透過X線を検出して、その透過X線のX線強度を示す画像データを出力するX線検出手段2と、前記画像データに基づくX線強度分布像上に複数の関心領域を設定する関心領域設定手段7と、各関心領域のX線強度を示す指標の代表値を算出するX線強度算出手段8と、前記複数の関心領域のX線強度の代表値の中から一つの代表値を選択するX線強度選択手段9と、前記選択されたX線強度の代表値に基づいて、X線発生手段1の露出制御を行うX線露出制御手段5と、を備える。
