The invention relates to an apparatus for measuring a biomagnetic field. It is an object of the invention to provide an improved biomagnetic field measuring apparatus, in particular a biomagnetic field measuring apparatus enabling reliable biomagnetic field measurements in clinical practice. For solving the problem, the invention provides an apparatus for measuring a biomagnetic field comprising a plurality of magnetic field sensors being arranged in an array in a sensor plane, the plurality of magnetic field sensors consisting of a plurality of first magnetic field sensors being designed and configured to measure a first component of the magnetic field, a plurality of second magnetic field sensors being designed and configured to measure a second component of the magnetic field, and a plurality of third magnetic field sensors being designed and configured to measure a third component of the magnetic field, the first, second and third components of the magnetic field being orthogonal to each other, and wherein, viewed from a direction perpendicular to the sensor plane, the first magnetic field sensors and the second magnetic field sensors are arranged essentially centrally and the third magnetic field sensors are arranged essentially around the first and second magnetic field sensors.L'invention concerne un appareil de mesure d'un champ biomagnétique. Un objet de l'invention est de fournir un appareil de mesure de champ biomagnétique amélioré, en particulier un appareil de mesure de champ biomagnétique permettant des mesures de champ biomagnétique fiables en pratique clinique. Pour résoudre le problème, l'invention propose un appareil de mesure d'un champ biomagnétique comprenant une pluralité de capteurs de champ magnétique disposés en réseau dans un plan de capteurs, la pluralité de capteurs de champ magnétique étant constituée d'une pluralité de premiers capteurs de champ magnétique conçus et configurés pour mesurer une première composante du champ magnétique, d'
