Abstract: A DC connector with a voltage-stabilizing function has a tube and a wire connected with a noise-resistant filter between the tube and the wire. The tube has an upper cap and a lower opening. The lower opening has an internal terminal for electrical connection when the tube is inserted into a corresponding socket. The upper cap of the tube has a first connecting part. An outer wall of the tube near the upper ring has a second connecting part. The filter has two electrode terminals electrically connecting to the first and second connecting parts, respectively. The first and second connecting parts also electrically connect to the anode and cathode of the wires. Therefore, when an electrical signal is sent from the wire to the first connecting part, the filter provides the functions of filtering noises for stabilizing voltage.