An optical driving device is equipped with: a light guide unit 10 that guides driving light of two or more colors having different wavelengths; a driving unit 21 having a photochromic material; and a light introduction unit 22 that is optically coupled to the light guide unit 10 and the driving unit 21, and that introduces the driving light guided from the light guide unit 10 into the driving unit 21. The driving light passes through the light guide unit 10 and the light introduction unit 22 and is introduced into the driving unit 21, and reversibly displaces the driving unit 21.
