To provide a method of manufacturing a water-tight and air-tight three dimensionally structured cloth using a three dimensionally structured cloth structured by joining opposed two woven fabrics with a joining thread with a proper interval as a base cloth to be suitably used as an air deck or the like.

The method of manufacturing the water-tight and air-tight three dimensionally structured cloth comprises the steps of: using the three dimensionally structured cloth structured by joining opposed two woven fabrics 1, 1 with many joining threads 2, 2 with the proper interval as the base cloth; carrying out the sewing R of both corner parts E, E together and (1) laminating a synthetic resin layers or rubber layers 3, 3 on each of surfaces side of two woven fabrics or (2) laminating the synthetic resin layers or the rubber layers 3, 3 on each of surfaces side of two woven fabrics; and performing heating under a pressure or roto-vulcanizing in such a manner that the inside surfaces of the two woven fabrics are blocked to each other by the synthetic resins or rubber leaching to the rear surface side through the meshes of the woven fabrics to the extent that these surfaces are peeled under pressurization by air blowing.