Magnetic sensor including bias magnetic field generation unit for generating stable bias magnetic field

A magnetic sensor comprising:

• at least one magnetic detection element for detecting a magnetic field to be detected;
• and
• a bias magnetic field generation unit for generating a bias magnetic field to be applied to the at least one magnetic detection element, wherein
• the bias magnetic field generation unit includes a ferromagnetic layer and a first antiferromagnetic layer that are stacked along a first direction, and has a first end face and a second end face located at opposite ends in the first direction,
• the ferromagnetic layer has a first surface and a second surface located at opposite ends in the first direction,
• the first antiferromagnetic layer is in contact with the first surface of the ferromagnetic layer and exchange-coupled to the ferromagnetic layer, and
• the at least one magnetic detection element is placed such that at least a part of each of the at least one magnetic detection element is contained in a space formed by shifting an imaginary plane equivalent to the first end face of the bias magnetic field generation unit away from the second end face along the first direction.