The invention relates to a multi-chamber tube, produced from a flat sheet (2), welded along the longitudinal surfaces with two planar face surfaces (5, 6), two curved narrow sides (3, 7) and webs (8), folded from the flat strip (2) which divide adjacent (chambers (9, 10) and which are soldered to the opposing tube inner wall (6) and a method for production thereof. According to the invention, the flat strip (2) comprises inward projections (15) in the region of the soldering of the webs (8).