An optical switching device includes: a plurality of optically variable bodies that are each variable in a degree of an optical state according to electric power; and an optical adjustment layer located between the plurality of optically variable bodies. The optically variable bodies each include: a pair of substrates; a pair of electrodes located between the pair of substrates; and an optically variable layer located between the pair of electrodes. The optical adjustment layer adheres the plurality of optically variable bodies in sheet form in a thickness direction, and adjusts a refractive index between respective substrates of adjacent optically variable bodies. The pair of electrodes have an exposed surface for supplying the electric power. An adhesion strength of the optical adjustment layer to the substrates is higher than an adhesion strength of the optically variable layer to the electrodes.