a compressed-gas tank system has at least two gas vessels, the gas vessels having a base part and a removal part and openings which are assigned to the removal parts. The removal parts of the gas vessels are directly connected to a connecting rail, without any pipelines therebetween. The openings are in communication with a gas passage which runs inside the connecting rail, the connecting rail being assigned a shut-off valve which is common to all the gas vessels. The gas vessels are mechanically connected to a supporting rail, the supporting rail and the connecting rail forming a holding frame for the gas vessels.