CURRENT SENSOR

Provided is a current sensor that maintains high accuracy of current measurement and permits the accuracy of installation to be relaxed. The current sensor includes a magnetic sensor module including a plurality of magnetic sensor units (11a to 11h) connected in series. The magnetic sensor units each include a first magnetic sensor element (12a) and a second magnetic sensor element (12b) which have sensitivity axes oriented in opposite directions. A first terminal (12aa) of the first magnetic sensor unit is connected to a first potential source. A third terminal (12ba) of the first magnetic sensor unit is connected to a second potential source. A second terminal (12ab) and a fourth terminal (12bb) of the last magnetic sensor unit are connected to constitute a sensor output terminal. The first terminal of each of the magnetic sensor units (11b to 11h) excluding the first magnetic sensor unit (11a) is connected to the second terminal of the next magnetic sensor unit and the third terminal thereof is connected to the fourth terminal of the next magnetic sensor unit. The sensitivity axes of the plurality of first magnetic sensor elements and the sensitivity axes of the plurality of second magnetic sensor elements are arranged along concentric circles.