A magnetic inspection device comprising: a magnetic sensor device including: a case disposed facing an object (P) that is to be detected; a plurality of magnetic sensing portions accommodated inside the case ; a magnet configured to generate a bias magnetic field (MB), the bias magnetic field (MB) is applied to the plurality of magnetic sensing portions ; and a magnetic generator disposed inside the case , between the plurality of magnetic sensing portions and the object (P) that is to be detected, wherein the magnetic generator is a non-magnetic conductive member , and the conductive member is disposed along a direction in which the magnetic sensing portions are arranged in a line; the magnetic inspection device further comprising: an inspection unit configured to inspect the object (P) that is to be detected, using signals output from the plurality of magnetic sensing portions ; a current supply unit (21, R) configured to supply a current to the magnetic generator when the object (P) is not present, thereby causing the magnetic generator to generate a magnetic field that acts on the plurality of magnetic sensing portions ; and a correcting unit configured to cause a value of each signal output by the plurality of magnetic sensing portions to match a predetermined target value, according to the magnetic field generated by the magnetic generator . a case disposed facing an object (P) that is to be detected; a plurality of magnetic sensing portions accommodated inside the case ; a magnet configured to generate a bias magnetic field (MB), the bias magnetic field (MB) is applied to the plurality of magnetic sensing portions ; and a magnetic generator disposed inside the case , between the plurality of magnetic sensing portions and the object (P) that is to be detected, wherein the magnetic generator is a non-magnetic conductive member , and the conductive member is disposed along a direction in which the magnetic sensing portions are arranged in a line; the magnetic inspection device further comprising: an inspection unit configured to inspect the object (P) that is to be detected, using signals output from the plurality of magnetic sensing portions ; a current supply unit (21, R) configured to supply a current to the magnetic generator when the object (P) is not present, thereby causing the magnetic generator to generate a magnetic field that acts on the plurality of magnetic sensing portions ; and a correcting unit configured to cause a value of each signal output by the plurality of magnetic sensing portions to match a predetermined target value, according to the magnetic field generated by the magnetic generator . an inspection unit configured to inspect the object (P) that is to be detected, using signals output from the plurality of magnetic sensing portions ; a current supply unit (21, R) configured to supply a current to the magnetic generator when the object (P) is not present, thereby causing the magnetic generator to generate a magnetic field that acts on the plurality of magnetic sensing portions ; and a correcting unit configured to cause a value of each signal output by the plurality of magnetic sensing portions to match a predetermined target value, according to the magnetic field generated by the magnetic generator . <EOS>