The present invention relates to a plug connector arrangement with a plug, having first catch arms arranged parallel to the plug-in direction and a secondary locking, as well as a mating plug with shoulders, behind which catch lugs engage in a final plugged-in position on the first catch arms. The secondary locking is released from a pre-catch position by the mating plug during the plug-in process and, on reaching its final catch position, is held back by the first catch arms until the catch lugs thereof are locked behind the shoulders of the mating plug.