The magnetic sensor includes a magnetic flux concentrator member having a length in a direction of a second axis, a first magnetic detector arranged on a negative side of a first axis from the magnetic flux concentrator member and on a positive side of the second axis from a midpoint of the magnetic flux concentrator member in a length direction, a second magnetic detector arranged on a positive side of the first axis from the magnetic flux concentrator member and on the positive side of the second axis from the midpoint of the magnetic flux concentrator member in the length direction, and a third magnetic detector arranged on the negative side of the first axis from the magnetic flux concentrator member and on a negative side of the second axis from the midpoint of the magnetic flux concentrator member in the length direction.