Abstract: A fixing device for mounting a button having a switch includes a base defining a though hole for receiving the switch, two first mounting walls adjacent to the through hole configured for clipping the button, a second mounting wall adjacent to the through hole and including a first blocking portion, an elastic piece adjacent to the through hole, and a third mounting wall extending from the elastic piece and including a second blocking portion. The first mounting walls are spaced by the through hole and located at two opposite sides of the through hole. Each first mounting wall includes a hook. The hooks are opposite to each other configured for clipping the button. The second mounting wall and the elastic piece are located at another two opposite sides of the through hole. The first blocking portion and the second blocking portion are configured for blocking the button therebetween.