A profile connector is disclosed for connecting two profile bars. Each profile bar may have an undercut longitudinal groove running parallel to an axis of the profile bar. The profile connector includes a screw having a first drive element, a shank having a male thread, and a screw head for engaging a longitudinal groove undercut of one of the two profile bars. The screw also includes a second drive element on an end of the screw opposite the first drive element. The male thread comprises a self-forming thread. In some embodiments, the profile connector is a two-piece design comprising the screw and a sleeve for receiving the screw. The sleeve includes a male thread for screwing the profile connector into one of the longitudinal grooves of one of the profile bars. The sleeve also includes a female thread corresponding to the male thread of the screw for receiving the screw.