An electrical connector includes an insulating body, an inner flexible plug, two metal housings and a flexible cable. The insulating body includes a base, two side portions set on two opposite sides of said base respectively and a top board connected between the side portions. A plurality of terminal grooves is defined in the base. The inner flexible plug is combined in the insulating body. The metal housings cover the insulating body. The flexible cable is set between the insulating body and the inner flexible plug. The inner flexible plug defines a plurality of receiving slots corresponding to the terminal grooves. The receiving slots extend from top side of the inner flexible plug to its bottom side in a bent way thus the flexible cable can be electrically connected with electrical connecting terminals set in the terminal grooves. Therefore, the electrical connector is easily assembled and has a stable structure.