The movable contact unit with a light-guiding function has the following structure. An uneven section is formed in a section that is to be lighted on the lower surface of a TPU base sheet. A film with a refractive index of light lower than that of the base sheet is disposed beneath the lower surface of the base sheet in a manner that the uneven section is embedded in the film. Besides, an adhesive layer is disposed beneath the film so as to hold a movable contact. The movable contact unit structured above is effectively employed for a lighted panel switch capable of reducing loss in amount of light and providing the section that is to be lighted with required illuminance.