The present invention relates to a dish washing machine, and more particularly to a dish washing machine having a structure in which a bottom surface of the dish washing machine is not wet with water. The dish washing machine includes a washing chamber (150) for washing dishes, a fan (90) for discharging air from the washing chamber (150), a housing for a space to install the fan (90), an exhaust duct (92) for guiding the air from the housing (94) to an outside of the dish washing machine, and a passage for draining water to an outside of the housing (94) whenever the water is present in the housing (94).