MAGNETIC SENSOR

PROBLEM TO BE SOLVED: To provide a magnetic sensor capable of reducing disturbance sensitivity even if offset is generated particularly between a soft magnetic body and a magnetoresistance effect element.SOLUTION: A magnetic sensor includes: a fist magnetoresistance effect element S1 that is located on a Y1-side part side of a soft magnetic body 3, and has a sensitivity axial direction P1 that receives a horizontal magnetic field component from Y2, Y1; a second magnetoresistance effect element S2 that is located on a Y2-side part side of the soft magnetic body, and has a sensitivity axial direction P2 that receives a horizontal magnetic field component from Y2, Y2; a third magnetoresistance effect element S3 that is located on the Y2-side part side of the soft magnetic body, and has a sensitivity axial direction that receives a horizontal magnetic field component from Y2, Y2; and a fourth magnetoresistance effect element S4 that is located on the Y1-side part side of the soft magnetic body, and has a sensitivity axial direction that receives a horizontal magnetic field component from Y1, Y1. An A element group in which S1 and S2 are connected in series, and a B element group in which S3 and S4 are connected in series are configured. The A element group and the B element group are connected in series, and an output terminal is provided between the A element group and the B element group.