Splash-proof illuminated pushbutton switch with classy and refined stainless steel-effect button. Because it is possible to illuminate despite the stainless steel effect button, it directs a design that is different in illuminated and not-illuminated. Further, by inserting the film into the button, it is possible to display picture or text that stands out when illuminated, it can also contribute to enhancing the design of the equipment. It meets the potential needs of users.