Abstract: A connector with a direct locking and a rotational pre-ejection function is provided. The connector includes an insulated body, a plurality of terminals, an inner shell, an outer shell, a fastener, an ejector, a first elastic element, and a second elastic element. A plurality of push blocks are disposed in the outer shell, the ejector has a plurality of slope surfaces, and the push blocks are in contact with the slope surfaces, respectively. When the connector and a mating connector are inserted into each other, snap bodies of the fastener and fastener bodies of the mating connector can be snapped into each other to be directly locked. When the connector and the mating connector are to be separated from each other, the outer shell can be rotated to cause the snap bodies to disengage and to cause the push blocks to rotate while in contact with the sloped surfaces to effect ejector rods to move forwardly to eject the mating connector.