An electrical connector and a manufacturing method thereof are provided. The electrical connector includes: a terminal set having at least one middle terminal, a left terminal and a right terminal; a terminal base for allowing the middle terminal to penetrate therethrough and preventing it from touching a base body of the terminal base and for respectively positioning the left terminal and the right terminal at two sides of the middle terminal and making the left terminal and the right terminal electrically interconnected; and an insulating housing for positioning the middle terminal and the terminal base and for allowing both ends of each of the middle, left terminal and the right terminal to be respectively extended in a predetermined direction and beyond the insulating housing. The present invention can simplify manufacturing procedures of the electrical connector, more effectively assure positioning of the terminal set and improve product yield.