Abstract: A disposable collecting container of cardboard or synthetic material for used small articles and waste, especially for medical articles, which includes a substantially double layer blank which is foldable into an octagonal box. The wall which in folded-up condition of the box forms the upper longitudinal horizontal wall of the container is provided with a filling opening. The inlet opening is formed by wall sections and is adapted to be closed by yieldingly resiliently moving into the interior of the container.