Aerosol generating device

An aerosol generating device comprising:

• a body portion comprising:
• a vaporizer comprising a first heater and a liquid storage configured to store a liquid composition and configured to generate aerosol by heating the liquid composition via the first heater;
• a receiving hole configured to receive a cigarette;
• a second heater configured to heat the cigarette;
• and
• one or more air flow paths configured to cause the generated aerosol to pass through the cigarette and be discharged to outside;
• and
• a cover coupled to the body portion and comprising a plurality of passages comprising a first passage and a second passage which guide air from the outside to an entrance of the vaporizer via different routes, the first passage and the second passage being independent from each other,
• wherein the cover comprises an inner housing and an outer housing, the outer housing comprising a first through hole aligned with the receiving hole, the first through hole is being configured to receive the cigarette, and the first passage and the second passage are connected to the outside through the first through hole such that air moves from the outside to the first passage and the second passage through the first through hole,
• wherein the first passage is formed between the inner housing and the body portion, and
• wherein the second passage is formed between the outer housing and the inner housing.