A waterproof housing including a frame structure and a waterproof structure is provided. The frame structure includes an opening. The waterproof structure is fixed on the frame structure and covers whole of the external surface and the opening of the frame structure. The waterproof structure includes a plurality of ribs extending toward the opening correspondingly and located in the opening. An electronic device is further provided including the waterproof housing and a keyboard module. The keyboard module includes a plurality of keys. The keyboard module is disposed under the waterproof housing and passes into the opening from an underside of the frame structure. The waterproof structure covers the keyboard module disposed in the opening and is fixed between the keys via the ribs. Therefore, the electronic device and the waterproof housing thereof have an improved water-proof function and are convenient in use.