A cable connector includes an insulator, an electrical connection portion, a cable and a latch, wherein the electrical connection portion is disposed in the insulator, and one end of the cable is electrically connected to the electrical connection portion; a front end of the insulator is provided with a projecting portion extending toward a bottom end of the insulator, the latch is disposed on the projecting portion, and a latch projection is disposed on a surface of the latch; a rear end of the insulator is provided with a first positioning post projecting toward the bottom end of the insulator; and the projecting portion and the first positioning post of the cable connector are respectively cooperated with a docking connector. The cable connector can implement forward and reverse plug of the cable connector; thereby facilitating wiring of the customer on the mainboard.