A drug solution tank of the present invention is a drug solution tank for an ultrasonic inhaler, including a drug solution reservoir portion having an upper edge that surrounds an opening and a bottom portion formed so as to protrude downward, a flange portion formed so as to extend outward from the upper edge of the drug solution reservoir portion, and a leg portion that is continuous with the outer perimeter or lower surface of the flange portion, is formed so as to surround the drug solution reservoir portion, and extends downward past the bottom portion of the drug solution reservoir portion.
