Abstract: A plastic closure of an outlet fitting of a container includes a closure cap which is releasably attached to the outlet fitting, and a retaining strip which permanently connects the closure cap with the outlet fitting. The retaining strip includes a first and a second bottom end, an upper part, a first and a second strip section, and at least one tearable web. The retaining strip is connected with the closure cap via the at least one tearable web between the first bottom end and the second bottom end, and/or, the first strip section and the second strip section are connected with one another via the at least one tearable web, and/or, the retaining strip is connected with the closure cap or with a cap gripping area of the closure cap via the at least one tearable web.