The electric connector including a housing formed with a plurality of holes into each of which a terminal is inserted, the holes being aligned in a line in a first direction, a rear holder connected to the housing through a hinge such that the rear holder is rotatable relative to the housing, a first engagement unit for connecting the rear holder and the housing to each other, the first engagement unit being arranged at at least one of opposite ends in the first direction, and a second engagement unit for preventing the rear holder and the housing from separating from each other after the rear holder and the housing are connected to each other, the second engagement unit being situated between the holes located adjacent to each other.