Abstract: A spacer for insulating glass panes has a profile body configured as a closed hollow profile substantially closed in cross section, the profile body having first and second side walls in parallel spaced apart from each other, an inner wall extending between the first and second side walls, and an outer wall extending from the first to the second side wall spaced apart from the inner wall. The outer wall comprises a first wall section aligned substantially parallel to the inner wall, second and third wall sections arranged on both sides of the first wall section, the latter, in cross section to the axial direction of the body, aligned at an obtuse angle to the first wall section and to the respective adjacent side wall, and connect thereon. The spacer includes an integral, reinforcing element, extending from the first side wall over the outer wall to the second side wall.