The present application can provide an optical modulation device, an optical device or a manufacturing method therefor, the optical modulation device stably maintaining designed optical characteristics after an encapsulation process in which pressure is applied, such as an autoclave process. In addition, the present application can provide an optical modulation device, an optical device including same or a manufacturing method therefor, the optical modulation device effectively ensuring adhesive strength between upper and lower substrates and stably maintaining the alignment state of an optical modulation layer.