Air Shower is a self-contained chamber that can be mounted in clean rooms and other applicable environments at entrances. It reduces the particulate contaminants entering or leaving the clean room with spraying wind speed of 25 m/s. With an audio and visual display prompt, showering time can be changed from 0 seconds to 99 seconds with 6 air flow nozzles employed for contamination lift. Monitoring of different functions becomes simpler with a fully automatic microprocessor-controlled device.