Abstract: A frame for canvas or other cloth is made up of rectilinear sections assembled to form a predetermined polygonal shape having rectilinear sections of channel members (10, 12, 14) having several sides. Each channel member have at least one longitudinal groove (20) along one of the sides thereof. The groove receives the edge of a cloth (28) mounted to the frame. An elonagted tensioner (26) extends around the entire frame and is held securely in the groove (20); the latter being provided with a narrow slit (24).