Keyboard device

A keyboard device, comprising:

• a membrane circuit board comprising a membrane switch;
• a base plate comprising a plate body and a base coupling structure, wherein the plate body is located under the membrane circuit board, and the base coupling structure is protruded upwardly and penetrated through the membrane circuit board;
• and
• a key comprising:
• a keycap located over the membrane circuit board, wherein when the keycap is moved downwardly relative to the membrane circuit board, the membrane switch is triggered;
• a first connecting element connected between the keycap and the base plate;
• a second connecting element connected between the keycap and the base plate;
• and
• a stabilizer bar comprising a transverse bar part, a first hook part and a second hook part, wherein the first hook part and the second hook part are respectively located at two ends of the transverse bar part, the transverse bar part is connected with the keycap, the first hook part is connected with the first connecting element, and the second hook part is connected with the second connecting element, wherein while the keycap is moved upwardly or downwardly relative to the base plate, the stabilizer bar is swung to stabilize the key.