Abstract: The present invention relates to a method and an apparatus for manufacturing a fiber slab (32), in which a fiber/air suspension is blown through a nozzle into a forming space (9). The forming space is defined by two mutually facing belt parts of two endless belts (10, 11). For the purpose of manufacturing the novel fiber slab, there is generated between the nozzle exit orifice (8') and the forming chamber a mist of highly liquid adhesive, and the fibers are imparted kinetic energy of such high value that the fibers pass essentially rectilinearly through the mist and into the forming chamber, where they collect on the slab end surface (36) earlier formed in the forming chamber and facing the nozzle.