PROBLEM TO BE SOLVED: To provide a magnetocardiographic measuring device capable of measuring a magnetocardiogram with higher accuracy. SOLUTION: A magnetic sensor array 210 composed of a plurality of magnetic sensor cells 220, each capable of detecting an input magnetic field in three axial directions, arranged in three dimensions, and an input magnetic field including a magnetic field generated by electrical activity of the heart. A measurement data acquisition unit that acquires measured values based on the above, a gradient magnetic field calculation unit 940 that calculates a gradient magnetic field using a plurality of measured values measured between a plurality of magnetic sensor cells, and an input magnetic field using a gradient magnetic field. A magnetic magnetism measuring device including a signal space separation unit 960 that separates a spatial distribution into a magnetic field and an environmental magnetic field. [Selection diagram] FIG. 9【課題】心磁をより高精度に計測することが可能な心磁計測装置を提供する。【解決手段】各々が３軸方向の入力磁場を検出可能な複数の磁気センサセル２２０を三次元に配列して構成される磁気センサアレイ２１０と、心臓の電気活動により発生する心磁を含む入力磁場に基づく計測値を取得する計測データ取得部と、複数の磁気センサセル間で計測された複数の計測値を用いて勾配磁場を算出する勾配磁場演算部９４０と、勾配磁場を用いて、入力磁場の空間分布を、心磁と環境磁場とに信号分離する信号空間分離部９６０と、を備える、心磁計測装置。【選択図】図９
