A flexible circuit board for keyboard, including an upper layer polyester film, a spacer and a lower layer polyester film, wherein the upper layer polyester film, the spacer and the lower layer polyester film are overlapped in order, the lower surface of the upper layer polyester film is provided with a first printed circuit, the upper surface of the lower layer polyester film is provided with a second printed circuit, the spacer is provided with a third printed circuit, the third printed circuit is provided with a connecting point, and the connecting point contacts and is communicated with the first printed circuit.