A keyboard device includes a key structure, a switch circuit board, a base plate and a buffering element. The key structure includes a keycap and a stabilizer bar. The stabilizer bar is connected with the keycap. The base plate includes a connecting structure. The stabilizer bar is penetrated through the connecting structure and connected with the base plate. The buffering element is coupled with the connecting structure. The stabilizer bar and the base plate are made of metallic material. Since the stabilizer bar and the base plate are separated by the buffering element, the keyboard device is capable of reducing noise.