Abstract: The invention relates to a gas distributor (1, 2) for a CVD reactor comprising two or more chambers (8, 9, 14), with supply lines ending therein, wherein at least one of the chambers (8, 9) forms a gas volume and is connected to gas outlet openings (23) associated with the bottom (2) of the gas distributor (1, 2) by means of a plurality of small tubes (11, 12, 13) crossing at least one other chamber (9, 14). For simplified production and technical enhancement, the gas distributor (1, 2), at least in the region of the small tubes (11, 12, 13), is made of a plurality of structured disks resting on top of each other, which are diffusion-welded to each other by pressure and temperature.