Magnetic sensor, and a current sensor and position detection device using a magnetic sensor

A magnetic sensor comprising:

• a magnetoresistive effect element including a first side surface and a second side surface, which face in opposite directions along a first axis, and a first end surface and a second end surface, which face in opposite directions along a second axis, wherein the first axis is substantially orthogonal to the second axis, and the magnetoresistive effect element has a sensitivity axis that extends in a direction of the first axis;
• a first yoke unit provided adjacent to the first side surface of the magnetoresistive effect element;
• and
• a first bias magnetic field generation unit provided adjacent to the first end surface of the magnetoresistive effect element,
• wherein the first bias magnetic field generation unit is provided to be capable of applying a bias magnetic field on the magnetoresistive effect element and the first yoke unit.