A switch panel illumination structure for mounting to an outer side of an indoor switch includes a panel provided with a receptacle, and an illumination mechanism detachably received in the receptacle. A tape feeding section feeds a tape material in the form of a laminate of a printing tape and a peel-off paper. The second plate is rotationally secured to the bracket member. Also, during a failure or breakage or wearing of specific component, only the failed components are replaced with the new one resulting easy and cost effective maintenance.