The present invention relates to a food dehydrator including: a body having a front door detachably mounted on the front surface thereof, a plurality of air inlet holes formed on the rear surface thereof and a plurality of body air discharge holes formed on the side surfaces thereof an inner casing having a dry room formed at the internal space thereof, a plurality of inner casing air inlet holes formed on the rear surface thereof, a plurality of first air outlet holes and second air outlet holes formed on the side surfaces thereof a fan adapted to supply the external air to the dry room and a heating member disposed behind the fan along an air flowing path so as to heat the air supplied to the dry room.
