A germicidal device for elevator buttons includes a casing and a lamp tube installed inside the casing and capable of emitting germicidal light. The casing can be fixedly mounted on an elevator control panel for the germicidal light emitted from the lamp tube to project onto all elevator buttons on the elevator control panel, so as to continuously kill any germs on the elevator buttons. The casing is provided on a bottom with an elongated slot, via which the germicidal light emitted from the lamp tube is outward projected onto all the elevator buttons. The lamp tube can be a UV germicidal lamp tube for emitting UV germicidal light.
