Abstract: A sliding roof for use on a building, particularly a sports hall, a swimming pool, the yard of a school or a shopping center, wherein in a supporting structure a plurality of parallel beams are slidably supported, two successive beams are interconnected by two layers of gas-tight cloth, the chambers formed by two beams and two layers of cloth are closed in a gas-tight manner near the ends of the beams, each chamber communicates with a compressor for the supply of a gas, particularly air, to said chamber and means are provided for securing in place the outermost beams with respect to the rims of the opening to be covered.