PROBLEM TO BE SOLVED: To provide a magnetic sensor capable of detecting components in a plurality of directions of a magnetic field, and capable of accurately detecting the magnetic field with a simple configuration.SOLUTION: A magnetic sensor includes: a light flux emission section emitting a plurality of light fluxes； a first cell to which the light fluxes being emitted from the light flux emission section and traveling in a first direction are made incident, the first cell accommodating a medium changing optical characteristics of the light fluxes according to magnitude of a magnetic field； a first light flux bending section bending a part of the plurality of light fluxes emitted from the light fluxes emission section in a second direction different from the first direction； a second cell to which the light fluxes bent in the second direction in the first light flux bending section are made incident, the second cell accommodating the medium changing the optical characteristics of the light fluxes according to the magnitude of the magnetic field； a first photodetector detecting optical characteristics of light fluxes emitted from the first cell； and a second photodetector detecting optical characteristics of light fluxes emitted from the second cell.SELECTED DRAWING: Figure 5【課題】磁場の複数方向の成分を検出可能であり、簡素な構成で精度よく磁場を検出することができる磁気センサーを提供する。【解決手段】複数の光束を射出する光束射出部と、前記光束射出部から射出され第１方向に進行する光束が入射し、磁場の大きさに応じて光束の光学特性を変化させる媒体を収容する第１セルと、前記光束射出部から射出された複数の光束の一部を、前記第１方向とは異なる第２方向に折り曲げる第１光束折り曲げ部と、前記第１光束折り曲げ部において前記第２方向に折り曲げられた光束が入射し、磁場の大きさに応じて光束の光学特性を変化させる媒体を収容する第２セルと、前記第１セルから射出された光束の光学特性を検出する第１光検出器と、前記第２セルから射出された光束の光学特性を検出する第２光検出器と、を含む、磁気センサー。【選択図】図５
