To provide a position detector which can maintain linearity in the output characteristics, between the rotation angle of an operating means and the output voltage.

A magnetic head consists of one pair of magnets 5 which is located between a pair of magnetic materials 4 having counter positioned surfaces, a magnetic closed circuit which is formed with the one pair of magnetic materials 4 and the one pair of magnets 5. A transfer part 3 moves the previous magnetic head, depending on an operating quantity of an operating means. A magnetic detection body 6 is located inside of the magnetically closed circuit and detects the change in the leakage magnetic field, generated inside of the magnetic closed circuit corresponding to the transfer of the transfer part 3. One pair of magnetic materials 4 has a part whose width is made gradually different.