Abstract: A female socket of a connector adapted for connecting to coaxial wires of a flat cable. The female socket mainly includes a socket base, a cover, and a metal shell. The socket base is provided at one front side with a plurality of insertion slots and a plurality of terminal receiving slots corresponding to and communicable with the insertion slots for each receiving an electrical terminal therein. The flat cable is extended into the socket base from another side opposite to the insertion slots with each coaxial wire of the flat cable rested in one terminal receiving slot to contact with an inner arm portion of the terminal. The cover is closed to a top of the socket base to tightly press the coaxial wires against the terminals. The cover has a top window for receiving a ground pin which contacts with a conductive plate connected to the coaxial wires.