Disclosed herein are a washing machine and a control method thereof that are capable of improving the deodorization efficiency without the provision of an additional unit. The washing machine includes a water supply unit (40), a rotary tub (30), a water tub (20), a first heater (15) mounted in the water tub to generate steam necessary to humidify an object to be deodorized, and a blowing unit (60) to suction air from the outside of the water tub and supply the suctioned air into the rotary tub. Consequently, it is possible to humidify the object using the first heater, located at the bottom of the water tub, whereby the manufacturing costs of the washing machine are reduced. Also, air, introduced from the outside of the water tub, is supplied to the object, whereby the deodorization efficiency is improved.