Atomizer, aerosol generating device and electronic cigarette

The utility model provides an atomizer which comprises a liquid storage component, a liquid outlet component, a liquid inlet component, a liquid outlet component, a liquid inlet component and a liquidoutlet component. The heating part is arranged at the bottom of the liquid storage part, or is arranged on the liquid storage part in a sleeving manner or is inserted into the liquid storage part, the heating part enables liquid gathered on the heating part and/or around the heating part to be atomized through heating, and the heating part is detachably connected with the liquid storage part. Theutility model further provides an aerial fog generating device and an electronic cigarette. According to the atomizer and the aerial fog generating device, the electronic cigarette and the liquid storage component are integrated cylinders, liquid storage and liquid guiding can be achieved, structural components are reduced, and liquid atomization and aerosol generation can be achieved without theliquid guiding component.