Abstract: A device for fixing and sealing a container having an open frontal side against a cover which permits detaching the container from the cover, in particular an absorber container for carbon dioxide in a respiration apparatus, allows the absorber container to be quickly detached so that it can be rapidly emptied or filled, and the absorber container can then be quickly reaffixed and sealed gas tight. For this purpose, a sealing and fixing arrangement is disposed along the longitudinal side of the container against the open frontal side thereof so as to be displaceable into two end positions, whereby in the first end position the arrangement has a shorter distance to the open frontal side of the container than in the second end position.