As for the non destructive flaw detection device of the pressure container by the measurement of the leakage flux which relates to one execution example of this invention, being provided on one side outside the pressure container, other than outside the coil volume stand and the pressure container which magnetize the pressure container arranging plural magnetic field inspection sensors on side, magnetizing the sensor backing and the pressure container which it provides, the endoscope where you can install the magnetic field inspection sensor above the yoke and one which generate magnetic flux to the direction of verticality vis-a-vis the direction of the magnetic flux which occurs due to the coil volume stand and, it includes.< Selective figure >Figure 3本発明の一実施例に係る漏れ磁束の測定による圧力容器の非破壊探傷装置は、圧力容器の外部の一側に設けられて圧力容器を磁化するコイル巻台と、圧力容器の外部の他側に複数個の磁界検知センサを配列して設けるセンサ支持体と、圧力容器を磁化してコイル巻台によって発生した磁束の方向に対して垂直の方向に磁束を発生させるヨークと、一つ以上の磁界検知センサが取り付けられた内視鏡と、を含む。【選択図】図3
