Abstract: A steam condenser wherein the steam is precipitated on tubes (13), through which cooling water flows and which are gathered into separate bundles. Each bundle is divided into compartments by support plates, the support plates being arranged perpendicularly to the tubes. The tubes, which are arranged in rows and form a bundle, envelop a cavity (19), in which a cooler (3) is disposed for the non-condensible gases. The non-condensible gases flow from the cooler (3) via orifices (6) into a suction channel (4), which is common to all compartments and extends over the entire length of the tubes (13). There is only one cooler (3), to which the suction channel (4) is directly attached, and the passage areas of the orifices (6) in the compartments are dimensioned in such a manner that the local, non-condensible mass flow is withdrawn with the locally available pressure difference.