An electrical connector can have improved productivity, as well as a reduced size and thickness. The electrical connector includes an insulating housing including a plate-like portion and a main body portion provided at the rear of the plate-like portion so as to protrude laterally relative to the plate-like portion; a conductive contact held by the housing, the contact including connection portions exposed at the plate-like portion so as to be connected to a mating contact of a mating connector and terminal portions protruding from the main body portion; and an elastically deformable seal member provided in the main body portion.