Abstract: An ultrasonic atomizer including a shell, a sealing cover, a base, a through pipe, an outer connecting ring, an inner connecting ring, an outer loudspeaker cover, a butt-joint pipe, an inner loudspeaker cover and an atomization mechanism, wherein the through pipe is arranged on the shell, the outer connecting ring is arranged at a corresponding position of the through pipe, the inner connecting ring is arranged inside the through pipe, the outer loudspeaker cover is arranged inside the shell, and an end portion of the outer loudspeaker cover penetrates out of the sealing cover and extends outside so as to be connected with the base, the butt-joint pipe is arranged inside the through pipe, the inner loudspeaker cover is connected with an end portion of the butt-joint pipe, and the atomization mechanism is arranged inside the base.