[OBJECTS AND PROBLEMS] Relating to a mist generator capable of emitting any of chemical substances used in life, such as perfumes, pharmaceuticals and pesticides, in the form of
fog or vapor. An object of the invention is to attain means for efficiently atomizing liquid, means for easily and rapidly switching the type of
chemical substance emitted and a compact apparatus of good
maintainability. [MEANS FOR SOLVING PROBLEMS] An apparatus comprises an ultrasonic
transducer; an
ultrasonic propagation medium disposed so as to fill a plane of vibration of the
transducer; liquid retaining means disposed so as to be in contact with an end face of the medium; and an ultrasonic focusing reflecting mechanism (concave reflection mirror) disposed in an
ultrasonic propagation path, thereby the apparatus attains discharging into air and atomization of the liquid by means of ultrasonic
waves. Atomization efficiency is enhanced by the use of an ultrasonic reflection tube, and mist emission is carried out. Use is made of a compact liquid container equipped at its bottom with an
ultrasonic transmission membrane. Various types of liquids can be atomized by changing the direction of ultrasonic course. Mist can be emitted by means of a thermal current as heating means. IC tag is attached to the liquid retaining means or
liquid injection means.