An atomizer and an electronic cigarette are provided. The atomizer includes: an atomizer cartridge, a liquid storage chamber, a liquid separation plate, an electric heating element, a cigarette liquid locking member, a first glass fiber cloth, and an atomizing electrode assembly. The electric heating element twists along the transverse direction of the atomizer, and is laid on the first glass fiber cloth, and the electric heating element laid on the first glass fiber cloth has a snakelike sheet structure. The cigarette liquid can be uniformly transferred to the electric heating element, and the volume of the aerosol is uniform. Furthermore, the quantity of the cigarette liquid transferred to the electric heating element is ensured to be uniform. In addition, the length of the electric heating element and the contact area of the electric heating element in contact with the first glass fiber cloth are effectively increased.