An atomizing sprayer includes a vapor tube, a front washer, an ultrasonic chip, a porous plate holder, a porous plate, a rear washer, and a chip holder. The chip holder has an opening hole at its center. One side of the chip holder has an accommodating space and a circular groove. The rear washer is disposed in the circular groove and its outer surface leans against the edge of the central hole of the ultrasonic chip. The porous plate holder is disposed on the ultrasonic chip and the porous plate is disposed on the porous plate holder. The outer protrusion ring of the front washer leans against the porous plate holder and the inner protrusion ring of the front washer leans against the porous plate, so the assembly of the ultrasonic chip, the porous plate holder and the porous plate can be fixed between the front and rear washers.
