A cable assembly comprises an insulative housing receiving a plurality of mating terminals therein, a cable extending beyond the housing and having a plurality of wires, a plurality of connecting terminals electrically terminated to the wires respectively, and an outer cover enclosing the housing and having a dustproof lid being delectably between an open position while the connecting terminals being exposed to an exterior and a closed position while the connecting terminals being covered by the dustproof lid for dustproof protection. The connecting terminals penetrate into the corresponding wires, respectively.