Ventilating device with air circulation control structure

A ventilation device having indoor air circulation control structure is provided to prevent dew generation effectively without needing drain structure by installing a damper control chamber for controlling air flow to one side of the ventilation device. A ventilation device having indoor air circulation control structure comprises a damper control chamber(10), dampers(50a,50b), a motor housing, a longitudinally moving link, a temperature sensor(70), and an air filter(80). The damper control chamber is connected to an outer air suction hole and an indoor air discharge hole in left and right sides of an outside surface, and forms an air supply hole(12) connected to an air supply path and an exhaust hole(13) connected to an exhaust fan. The damper is installed so as to open and close the outer air suction hole and the indoor air discharge hole according to an operation mode. The motor housing is installed in the inside middle of the front surface of the damper control chamber. The longitudinally moving link has one end fixed to both sides of a driving link and the other end fixed to the middle of the damper. The temperature sensor is installed to the outer air suction hole. The air filter is installed in one side of a heat exchanger.