Abstract: A ceiling structure having a plurality of ceiling sheets supported by a plurality of main beams and transverse suspension beams, the main beams on their upper part having resilient side webs to engage projections extending from the suspension beams, the main beams on their lower side having resilient web portions to secure some short beam-shaped suspension means, these suspension means having at their lower parts protruding suspension portions to engage grooves in adjoining ceiling sheets. This structure is easy to mount and permits a completely symmetrical pressure on the main beams during the mounting of each sheet.