Sliding device for card connector

The utility model relates to a sliding device for a card connector. A butt joint space is formed in an insulating base body, a sliding device is contained on one side of the butt joint space and the sliding device is provided with a butting body which can be butted above a guide bar. A plurality of conductive terminals are penetrated through the insulating base body, the conductive terminals can form electrical connection with a memory card, a circulation device can be pressed for a second time by a memory card, and thus the sliding device is pushed and the positioning or the card withdrawing state is formed. A clamping part and a butting part are formed by integral moulding on the butting body, the clamping part and the butting part can be respectively elastically butted on a card slot and a side edge of the memory card and thus the efficiency of accurate contraposition and stable positioning of the memory card can be achieved.