The present invention provides a highly reliable camera module optical shutter capable of preventing the occurrence of a streaky transparent portion in a polymer network liquid crystal layer in a scattering state, and a method for producing the camera module optical shutter. A camera module optical shutter includes a pair of substrates bonded together with a seal and a polymer network liquid crystal layer sealed between the substrates, wherein at least one of the substrates includes a transparent electrode made of an oxide conductive film and a silicon oxide layer covering the transparent electrode, and a silane coupling agent is bonded to a surface of the silicon oxide layer, the surface being in contact with the polymer network liquid crystal layer.