Magnetic sensor

The magnetic sensor includes a plurality of MR elements disposed in first to fourth regions. Each of the first to fourth regions has a first end edge and a second end edge located at both ends in the first reference direction, and a third end edge and a fourth end edge located at both ends in the second reference direction. The first and second end edges each extend along a second reference direction. The third and fourth end edges each extend along a third reference direction. Each of the plurality of MR elements has a shape that is long in a direction different from the first reference direction, the second reference direction, and the third reference direction. 磁传感器具备配置于第一～第四区域的多个MR元件。第一～第四区域各自具有位于第一基准方向上的两端的第一端缘及第二端缘、和位于第二基准方向上的两端的第三端缘及第四端缘。第一及第二端缘各自沿着第二基准方向延伸。第三及第四端缘各自沿着第三基准方向延伸。多个MR元件各自具有在与第一基准方向、第二基准方向及第三基准方向均不同的方向上较长的形状。