The position detection system is disposed on the opposite side of the detection target area of the detection body with respect to the detection body provided with a magnetic field generation unit that generates an alternating magnetic field and a permanent magnet, a plurality of detection coils, and the detection coil. Magnetic field generating device for generating a magnetic field for induction and a drive mechanism for changing at least one of the position and orientation of the magnetic field generation source, and at least a part of the magnetic field generating device for electric induction composed of a conductor that generates an interference magnetic field And a correction for correcting the measurement value of the intensity of the alternating magnetic field detected by each detection coil based on at least one of the position and orientation of the detection body calculated immediately before and at least one of the position and orientation of the conductor A correction value calculation unit that calculates a value, a magnetic field correction unit that corrects the measurement value using the correction value, and a position that calculates at least one of the position and orientation of the sensing object based on the measurement value And a detecting section, the correction value calculation unit is further using at least one of the position and orientation of the latest detection object, and calculates the correction value. 位置検出システムは、交番磁界を発生する磁界発生部と永久磁石とが設けられる検知体と、複数の検出コイルと、検出コイルに対して検知体の検出対象領域の反対側に配置され、検知体の誘導用磁界を発生する磁界発生源、並びに磁界発生源の位置及び姿勢の少なくともいずれかを変化させる駆動機構を有し、少なくとも一部が干渉磁界を発生する導電体からなる誘導用磁界発生装置と、直前に算出された検知体の位置及び姿勢の少なくともいずれかと導電体の位置及び姿勢の少なくともいずれかとに基づいて、各検出コイルが検出した交番磁界の強度の測定値を補正するための補正値を算出する補正値算出部と、補正値を用いて測定値を補正する磁界補正部と、測定値に基づいて検知体の位置及び姿勢の少なくともいずれかを算出する位置算出部とを備え、補正値算出部は、最新の検知体の位置及び姿勢の少なくともいずれかをさらに用いて、補正値を算出する。
