PURPOSE: To provide a liquid atomizer with a simple structure, preventing discharge of fog having coarse particles, eliminating to wet the surroundings of the liquid atomizer since heavy particles falls in the neighborhood, making fine particles uniformly floated in the whole room and prevailing the effect efficiently and for long hours.

CONSTITUTION: This device is provided with a container 1 having an air suction port 2 and a fog discharge port 3, a suction fun 4 for generating an air stream in the container 1, an air reflection plate 8 for generating an eddy current in the air stream, a liquid tank 5 for storing a liquid for atomizing and an ultrasonic vibration element 7 for generating a liquid pillar accompanying fog for the liquid in the liquid tank by ultrasonic vibration. Coarse liquid particles are stuck to the inside wall of the container and the air reflection plate 8 by a centrifugal force of the air eddy current in the container, and only fine particle sized - fog is discharged from the fog discharge port 3.