A female connector for supplying received power has a recess, terminals including power terminals for supplying the power, a locking mechanism to lock a male connector that is inserted into the recess in a mated state in response to insertion of the male connector into the recess, and a switching mechanism to supply the received power to the power terminals in an ON state and to insulate the power terminals from the received power in an OFF state. The switching mechanism is permitted to make a transition to the ON state only when the locking mechanism is locking the male connector in the mated state.