A cooking device includes a main body having a cooking space for cooking food; a base disposed at a lower side of the main body, and comprising a ventilation apparatus for suctioning and discharging contaminated air, the ventilation apparatus being connected to the lower side of the main body and having an introduction port; a swirler rotated so that the contaminated air is suctioned through the introduction port of the base, and having a plurality of wings; an installation part provided at the base; and a driving motor installed at the installation part and configured to generate power for rotating the swirler.