The present invention relates to a charging connector locking apparatus. The apparatus includes a coupling latch installed in an inlet housing of the inlet connector to be supported by a resilient member so as to be rotatable by a predetermined angle, and having an interlocking curved surface by which a tip end of the plug latch is guided; a fixing rod moved to be positioned at a side of the coupling latch facing the plug latch to prevent movement of the plug latch in a release direction; and a driving source for providing driving power for movement of the fixing rod.