Abstract: An electrical connector comprises an insulating body, a number of conductive terminals, and a metal shielding shell. The insulating body comprises a tongue plate. Each conductive terminal comprises a mating portion exposed to the tongue plate. The metal shielding shell at least partially encloses the tongue plate. The metal shielding shell comprises a receiving space for receiving a mating connector. The electrical connector also comprises a metal fixed shell expanding outwardly. Compared with the prior art, the present disclosure shortens the length of the metal shielding shell. After the metal shielding shell is installed on the device shell, it will not be obviously observed from the outside so as to improve the appearance. Besides, the shielding effect is improved by providing the metal fixed shell supported on the device shell. The present disclosure also discloses an electrical connector assembly having the electrical connector.