A connector for connecting two hollow-profile strips of an insulating glazing unit is presented. The connector includes two plug-in legs suitable for insertion into the hollow-profile strips, and a connection region where the two plug-in legs are connected. The connection region includes an outer surface, two pane contact surfaces, and an inner surface. According to one aspect, the connector includes a cavity to establish a passage from the inner interpane space to corresponding surroundings of the insulating glazing unit. According to another aspect, the cavity has a first opening in the outer surface of the connection region that is sealed with a gas-permeable and water-vapor-tight membrane.