The utility model relates to an atomizing device and an electronic cigarette adopting the atomizing device. The electronic cigarette comprises an upper shell, the atomizing device, a lower shell and a power supply device, wherein the atomizing device comprises an atomizing cavity, a heating device, a liquid storage container and a liquid guide piece; the atomizing cavity is provided with an air inlet hole and an air outlet hole; the liquid storage container is provided with an accommodating cavity; a smoke generation substance can be led out of the atomizing cavity by the liquid guide piece; the heating device heats and atomizes the smoke generation substance to generate smoke, and the smoke can be discharged from the air outlet hole; the liquid guide pipe is a liquid guide stick made of a permeation material; the liquid guide stick is arranged in the axial direction of the central shaft of the atomizing cavity; one end of the liquid guide stick is positioned in the accommodating cavity, and the other end of the liquid guide stick is positioned in the atomizing cavity. The electronic cigarette has the advantages that the liquid guide stick is arranged in the axial direction of the central shaft of the atomizing cavity, so that the heating power is guaranteed, and the liquid storage container is enabled to have a sufficient storage space; furthermore, mounting and replacement of the atomizing device are facilitated; the electronic cigarette is reasonable in structure and convenient to use.