Abstract: A tension ring, particularly for connecting two tube ends, includes several mutually linked segments. A closing device detachably connects two segments with one another. The position of the segments relative to one another is adjustable at least on one hinge element between two segments. As a result of the closing device preferably constructed as a quick-acting closure, a prefixing/pretensioning can be achieved and, subsequently, the tension of the tension ring can be regulated to the desired extent by an adjusting device without opening the closing device again.