Vacuum cleaner for industrial and domestic applications, in which the sucked up dust is collected in a vessel (1) filled with water (7). The necessary sucking action is generated with an air pump (2) or with a venturi (16), located in a suction tube (3) in front of the vessel (1). In order to realize complete washing out of the dust, the vessel (1) is provided with at least one grid (9) through which the air bubbles can escape.