A ventilation device (10) is provided with a casing (20) having formed therein a suction opening (21) for sucking outdoor air, a suction opening (22) for sucking indoor air, and an air discharge opening (23), and also with an air delivery fan (30) housed in the casing (20). The ventilation device (10) sucks outdoor air and indoor air from the suction openings (21, 22) into the casing (20) by the air delivery fan (30), processes the sucked air, and delivers the processed air to the indoors from the discharge opening (23). An electric dust collection unit (40) for removing dust in the sucked air is provided in the casing (20). A deodorizing unit (50) having low flow resistance and removing odorous substances in the sucked air is also provided in the casing (20).
