Abstract: An ultrasonic liquid atomizer with an orifice valve has an ultrasonic oscillator with an atomizer plate. An axial bore for liquid supply onto a surface of the atomizer plate is provided together with an impact body for deflecting and distributing supplied liquid on the atomizer plate. The impact body has a stem situated in the axial bore of the oscillator and of the atomizer plate, the impact body being approximately centered over the bore. The stem of the impact body is continued in the form of a retaining wire extending beyond the oscillator at the side opposite the atomizer plate. An end of the retaining wire opposite the stem is secured to a component for executing the motion of the impact body relative to the atomizer plate such that an orifice opening at the surface of the atomizer plate between the atomizer plate and impact body can be closed via the retaining wire and the stem of the impact body.