PROBLEM TO BE SOLVED: To provide an ultrasonic atomizer having excellent spraying stability.SOLUTION: When a liquid container 20 is attached/detached to/from an ultrasonic atomizer 1, an absorber 23 is also attached/detached to/from the ultrasonic atomizer 1 together with the liquid container 20. A diaphragm 32 vibrates so that the liquid supplied by the absorber 23 is atomized and sprayed. The absorber 23 has a liquid-holding weight of 54 mg or more and 86 mg or less.