An electrical connector includes an insulating body having a mouth and fastening passages connected with the mouth, first terminals disposed in the fastening passages with soldering tails stretching into the mouth and abutting against the bottom side of the mouth, and a lid mounted in the mouth. The lid has a restraining board abutting against a front side of the mouth to seal up the fastening passages for stopping solder flowing forward along the fastening passages, and a plurality of separating arms protruding rearward from a bottom of the restraining board and spaced from one another along a length direction of the restraining board to abut against the bottom side of the mouth. The soldering tails are respectively restrained between two adjacent separating arms and separated by the separating arms to make easier for being soldered with cables and avoid a short circuit among the soldering tails.