Ultrasonic nebulizer

An ultrasonic nebulizer comprising:

• a working tank in which an ultrasonic vibrator is incorporated and in which a working liquid is stored facing the ultrasonic vibrator;
• a medicine tank that stores a medicinal liquid, at least a bottom portion thereof being dipped in the working liquid;
• and
• a main body that includes an oscillation circuit that is to drive the ultrasonic vibrator,
• wherein the medicine tank is configured to be detachable with respect to the working tank,
• the working tank is configured to be detachable with respect to the main body,
• the working tank includes an approximately tube-shaped outer circumferential wall and an outer bottom surface that closes a lower portion of the outer circumferential wall,
• a bottom portion of the working tank has a double-bottomed structure that includes the outer bottom surface and an inner bottom surface that is provided on the outer bottom surface via a gap, and
• the working tank has a specific gravity that is larger overall compared to that of water or a disinfecting liquid and a weight is provided in the gap so that the working tank has a center of gravity at a part that is closer to the outer bottom surface than a center of buoyancy is, the center of buoyancy being a location at which a buoyant force is received from the water or the disinfecting liquid when the working tank is immersed in the water or the disinfecting liquid.