Abstract: A connector includes a body and a terminal. The body has an interior hollow for the terminal to fit therein and an outer surface provided with plural axial projecting ridges. The interior hollow has a large diameter portion, a medium diameter portion and a small diameter portion. The terminal is made of a metal, having an insulating tubular member, a large annular wall in an intermediate portion and a small annular wall behind the large annular wall, and the large annular wall fits in the medium diameter portion of the interior hollow of the body, and the small annular wall fits in the small diameter portion. So the terminal may be combined with the body stably.