The present disclosure discloses an electrical connector which comprises a shell, a first wafer group and a second wafer group. The shell comprises: a first frame portion defining a first slot; a second frame portion defining a second slot; a first supporting portion positioned at a first side of the shell; a second supporting portion positioned at a second side of the shell, and a bridging portion connecting the first frame portion and the second frame portion. The bridging portion, the first frame portion and the second frame portion cooperatively define an air flow channel. The first wafer group is assembled to the first slot. The second wafer group is assembled to the second slot.