The air shower pass box is an auxiliary device for clean room. It is mainly used for transferring small articles between clean areas or between clean and non-clean areas. Through the pass box, the clean room door opening frequency can be reduced and the pollution of clean areas can be minimized. To reduce dust particulate caused by the goods moving in and out, the purified air from HEPA filter spay on the goods in different direction through rotary nozzle. It can get rid of dust particulate efficiently.