A plug connector assembly includes a cable and a mating member electrically connected to the cable, the mating member having an insulative housing and a contacting module retained in the insulative housing, the contacting module having a first contacting module unit and a second contacting module unit, the first contacting module unit having plural first contacts arranged along a lateral direction and a first insulative member retaining the first contacts, the second contacting module unit having plural second contacts arranged along the lateral direction and a second insulative member retaining the second contacts, wherein each of the first and second insulative members includes a same engagement structure, through which the first insulative member and the second insulative member are assembled into a whole by interference arrangement and then inserted into the insulative housing together.