A continuable waterproof cable includes a cable body, first, second and third transmitting members, and first and second waterproof elastic members. The cable body has a connecting end and a continuing end opposite to the connecting end. The first transmitting member and the first waterproof elastic member are disposed at the connecting end. The second transmitting member is disposed at the continuing end, coupled to the first transmitting member, and adapted to a first end of the first transmitting member. The second waterproof elastic member is disposed at the continuing end. The third transmitting member is in the cable body and has a fixed end and a free end. The fixed end is at the continuing end, the free end is detachably coupled to the first transmitting member and capable to be apart from the transmitting member by a force.