A synthetic material clamp includes a band bent ring-shaped, having band ends with toothed coupling sections together forming a latching coupling. Each coupling section has a first latching element with a latching tooth directed toward a band inner side and a second latching element with a latching tooth directed toward a band outer side. The latching elements are arranged on the coupling sections so the first latching element of a coupling section engages upon closing of the latching coupling. The first and second latching elements are located on opposite sides of a plane centrally dividing the band in a longitudinal direction. The latching elements of both coupling sections include on a side facing the plane a supporting surface arranged when the latching coupling is closed, with the supporting surfaces of one of the latching elements engaging the supporting surfaces of the latching elements of the other coupling section.