A second duct is designed to oppose its air outlet to a portion of an air inlet of a first duct in an electronic apparatus. The wall member closes the air inlet of the first duct at a position outside the air outlet of the second duct. An opening is defined in the wall member. The opening enables a connection between the outer space of the second duct and the air inlet of the first duct. Airflow enters the air inlet of the first duct from the air outlet of the second duct as well as from the opening of the wall member, respectively.