Embodiments of the present invention disclose an ultrasonic atomizer and electronic cigarette. The ultrasonic atomizer comprises a liquid storage cavity and a piezoelectric ceramic piece both are provided in an outer sleeve； the plane where the piezoelectric ceramic piece is located is parallel to the axial line of the outer sleeve； at least one surface of the piezoelectric ceramic piece is in contact with a liquid storage body； the liquid storage body communicates with the liquid storage cavity； and an atomization surface of the piezoelectric ceramic piece communicates with an air passage.
