An audio jack (1) includes an insulative housing (2) defining an insertion opening (213), and a plurality of contacts (3) retained in the insulative housing (2); each contact (3) has a contact portion (313, 3212) extending into the insertion opening (213) and a tail portion (311, 3221) for connecting with a circuit board; at least a contact (32) comprises a mating section (321) for contacting with a corresponding audio plug (8) and a transmission section (322) separated with the mating section (321) for connecting with the circuit board which the mating section (321) does not connect; at least a contact portion (3212) is arranged on the mating section (321) to electrically connect with the transmission section (322) when the audio plug (8) is fully inserted into the insertion opening (213).