A suction cleaner comprising a motor which operates a blower in such a manner that the blower blows a flow of air out into a motor chamber that delimits a volume which extends at least radially around the motor, and then out through outlet openings arranged in said motor chamber, and wherein the motor chamber is provided with a silencer element made of a silencing material, such as foamed plastics, said silencer element enclosing the motor radially and forming a silencing chamber around the same, and wherein the silencer element is provided with flow passages which substantially constitute the flow connection from said silencing chamber to the outflow openings in the motor chamber. The fact that the flow passages in the silencer element according to the invention extend axially along the motor in substantially the entire length thereof provides an optimum silencing effect.