A plug connector includes a metal shell, an insulating body retained in the metal shell and having a mating portion, multiple terminals, and at least one grounding elastic piece. The mating portion is recessed from front to back to form a mating slot. The terminals include contacting portions arranged in a row on upper and lower opposite sides of the mating slot. The terminals include at least one ground terminal formed by blanking a sheet metal. The plate surface of the ground terminal is arranged vertically. The grounding elastic piece is formed by blanking a sheet metal. The plate surface of the grounding elastic piece is arranged in parallel to the plate surface of the ground terminal, and the two are connected electrically to each other. A conducting portion is formed on the cutting surface of the grounding elastic piece, and in contact with the metal shell.