To provide an optical induction device capable of measuring minute moving acceleration or inclination angle of an object, for higher measurement sensitivity.

The optical induction device includes a case containing a black body condition space within it, at least one light emitting member which projects optical beam into the black body condition space, at least one optical induction member which is provided in the case and adjoins the black body condition space, and a shielding member which is movably provided in the black body condition space, with at least one end part provided, and contacts the case by the end part, with at least one groove being provided. When the shielding member moves into at least one shield section in the black body condition space, the optical induction member is shielded by the shielding member, and when the shielding member departs from the shield section, the optical induction member emits induction signal when induced by an optical beam.