A plug-in connector part for connection to an associated mating plug-in connector part includes a housing part, which has a plug-in portion and a plurality of contact openings arranged in the plug-in portion each having a contact element arranged therein. The plug-in portion being can be brought into a plug-in connection with the associated mating plug-in connector part in a plug-in direction, and has an outer surface extending peripherally around the plug-in direction. The plug-in portion includes a plurality of drainage openings which are each associated with a contact opening and extend from the associated contact opening to the outer surface so as to lead liquid from the associated contact opening to the outer surface. At least one of the drainage openings extends along a first plane and at least a second drainage opening extends along a second plane offset from the first plane in the plug-in direction.