Provided are an electronic device, including a side frame, a signal triggering element fixedly disposed inside the side frame, and a button configured to extend through the side frame. The side frame defines a button hole directly facing the signal triggering element, and a limiting protrusion is arranged on an inner wall of the button hole. The button includes: a button post, extending through the side frame and disposed adjacent to the signal triggering element; a button cap, connected to the button post and engaged with the button hole; and a snap board, fastened to a side of the button cap facing the signal triggering element, wherein the snap board is configured with a hook engaged with the limiting protrusion for limiting.