PROBLEM TO BE SOLVED: To provide a magnetoencephalographic meter can reduce the effect of a magnetic field and an electromagnetic wave on the measurement of the magnetic field of a living body and can enhance the measuring precision of the magnetic field of the living body.SOLUTION: The magnetoencephalographic meter 1 includes an SQUID sensor 3 for detecting the magnetic field produced from the living body, a bottomed cylindrical Dewer 7 housing the SQUID sensor 3 in its bottom part 7b, the cylindrical magnetic shield body 11 provided in the periphery of the outer peripheral surface 7a of the Dewer 7 housing the SQUID sensor 3 to shield the SQUID sensor 3 from external magnetism, a stage 20 for mounting an examinee P so that the head of the examinee P is arranged at a measuring position H of the magnetic field of the living body by the SQUID sensor 3, and the auxiliary shield 21 provided in parallel to the magnetic shield body 11 so as to cover the space above the stage 20 on the side of the bottom part 7b of the Dewer 7 to shield the SQUID sensor 3 from an external electromagnetic wave.COPYRIGHT: (C)2010,JPO&INPIT【課題】生体磁場の測定に対する磁場及び電磁波の影響を低減させることができ、生体磁場の測定精度を向上できる脳磁計を提供する。【解決手段】脳磁計1は、生体から発生する磁場を検出するSQUIDセンサ3と、SQUIDセンサ3を底部7bに収納する有底筒状のデュワー7と、SQUIDセンサ3を収納したデュワー7の外周面7aの周囲に設けられ、SQUIDセンサ3を外部の磁気から遮蔽するための筒状の磁気シールド体11と、SQUIDセンサ3による生体磁場の計測位置Hに被験者Pの頭部が配置されるよう、被験者Pを搭載するためのステージ20と、デュワー7の底部7b側でステージ20上の空間を覆うように磁気シールド体11に並べて設けられ、SQUIDセンサ3を外部の電磁波から遮蔽するための補助シールド21と、を備える。【選択図】図1
