Magnetic detection device

A magnetic detection device, comprising:

• a magnetic moving body in which N-poles and S-poles are disposed alternately on a circular outer periphery thereof and which rotates with a rotating shaft as an axis;
• two magnetoresistive elements that are disposed adjacent the outer periphery of the magnetic moving body and that detect changes in a magnetic field of the magnetic moving body;
• a signal processing unit that processes signals of the magnetoresistive elements;
• and
• a magnet that applies a bias magnetic field to the magnetoresistive elements,
• wherein a magnetization direction of the magnet is parallel to the rotating shaft of the magnetic moving body;
• and
• the magnetoresistive elements are disposed in a plane perpendicular to the magnetization direction of the magnet, and
• the magnetoresistive elements are disposed side by side spaced apart from each other in a radial direction of the magnetic moving body.