Vacuum dressing sealed by an adhesive film (5) to which is coupled a suction tube (4) connected to a vacuum pump, said dressing comprising an external layer (2) of foam with open pores of large size, and a semi-permeable internal layer, characterized in that it constitutes a large integrated dressing incorporating a drainage device comprising tubes (9) with a plurality of holes (9a) at the ends thereof, one end being inserted in the external layer (2) and the other end in the operative plane (8).