The powerful and extremely robust wet/dry vacuum cleaner is equipped with a world-wide unique, highly efficient, automatic filter cleaning device which allows the pick-up of huge quantities of fine dust with constantly high suction performance without interruption of work. The safety vacuum cleaner is equipped with the antistatic system (grounded until suction hose connector) and electrically conductive accessory. Through the grounded connection port electrostatic charge will securely be deduced. The charge of the accessories through friction of dust inside the hose and the therewith combined sparking can safely be avoided with an electronically leading suction hose. The whole machine including accessory is equipped for dust class H and qualified and licensed for the suction of asbestos,as well. Also applicable as wet vacuum cleaner for the absorption of liquids.