A ventilation device installed on an infant incubator having a chamber of an infant, including: an exhaust part including an exhaust connect port connected to the chamber and an exhaust port communicated with the exhaust connect port； an air-supply part including an air-supply connect port connected to the chamber and an intake port of external air communicated with the air-supply connect port； at least one of an exhaust blower and an air-supply blower: the exhaust blower is provided at the exhaust part and generates an air stream flowing from the exhaust connect port toward the exhaust port, and the air-supply blower is provided at the air-supply part and generates an external-air stream flowing from the intake port of the external air toward the air-supply connect port: the air is exhausted from the chamber through the exhaust part, and the external air is supplied into the chamber through the air-supply part.
