Provided is a biomagnetic measurement apparatus that can accurately diagnose a faulty part and that can be used easily and easily. One embodiment of the biomagnetic measuring device 1 of the present invention is fixed to a tubular body 10, an inflatable portion 11 that is located in a required region of the tubular body 10 and can be inflated by supplying gas, and an inner wall of the inflatable portion 11. And a magnetic sensor unit 13 for detecting a magnetic field from the outside of the tube body 10. It is preferable that the tubular body 10 and the expanding portion 11 are made of the same material, and the thickness of the expanding portion 11 is thinner than the thickness of the tubular body 10.障害部位を正確に診断でき、かつ、簡便、気軽に利用可能な生体磁気計測装置を提供する。 本発明の生体磁気計測装置１の一実施形態は、管体１０と、管体１０の所要の領域に位置し、気体の供給により膨張可能な膨張部１１と、膨張部１１の内壁に固定され、管体１０の外方からの磁場を検出する磁気センサ部１３とを備える。管体１０及び膨張部１１は同じ材料からなり、膨張部１１の肉厚が管体１０の肉厚よりも薄いことが好ましい。
