An audio jack includes an insulated base including an upper plate and a lower plate connected to the upper plate, wherein a connecting portion between the upper plate and the lower plate forms a socket for plugging an audio plug, and a slot, formed between facing surfaces of the upper plate and the lower plate, is configured for installing a circuit board in a plugging manner; and a metal contact terminal configured to electrically connect the audio plug plugged into the socket to a corresponding conductive trace on the circuit board installed in the slot.