PROBLEM TO BE SOLVED: To provide an air conditioning system capable of surely sucking air in the vicinity of a boundary part between a ceiling and a wall.SOLUTION: In an air conditioning system 10, one end part of a second duct D2 is connected to an exhaust port 43 of a hollow intake member 41 arranged in the vicinity of a boundary part between a ceiling and a wall 4, and the other end part is connected to a connection part J of a first duct D1. The connection part J generates a suction force by a flow of air inside the first duct D1. By operating the air conditioning system 10 and making the air flow inside the first duct D1, the suction force generating in the first duct D1 is guided to the second duct D2, the intake member 41 sucks the air in the vicinity of the boundary part 8, and it is mixed with the air in the first duct D1 through the second duct D2 and the connection part J from the exhaust port 43. The mixed air is cleaning-processed by a filter of a filter unit 20, and blown out into an operation room 1 from a first outlet 23. As the air in the vicinity of the boundary part 8 between the ceiling and the wall 4 can be surely cleaned, the cleanliness of the operation room 1 can be enhanced.
