An aerosol generating apparatus includes a main body; a cartridge detachably coupled to the main body, comprising an air inlet hole through which external air is introduced, and configured to store a liquid material and generate aerosol by heating the liquid material; a cigarette detachably coupled to the main body, comprising a solid material, and disposed on a path along which the aerosol generated in the cartridge flows such that the aerosol passes through the solid material and is discharged to outside; and a cover detachably coupled to the main body to cover the cartridge coupled to the main body and comprising: a cigarette hole through which the cigarette is coupled to the main body; and a ventilation hole formed at a position adjacent to the air inlet hole of the cartridge and configured to discharge the aerosol remaining in the cartridge to the outside or introduce the external air.