An active plug connector (100; 300) adapted to plug into a receptacle includes a shell (11; 21; 31) defining a receiving room (114; 314), a pair of printed circuit boards (12, 13; 22, 23; 32, 33) received in the receiving room and disposed horizontally and spaced apart from each other along a vertical direction, an active element mounted on one of the two printed circuit boards, and a connecting member (14; 24; 34) electrically connected with the two printed circuit boards to share the active element. A method for assembling the active plug connector comprises inserting the connecting member into the receiving room to electrically connect with the conductive pads of the printed circuit boards to share the active element.