PROBLEM TO BE SOLVED: To provide a setup for precluding the entry of air into a sterilizing chamber.SOLUTION: The provided apparatus is furnished with: a concentration chamber for concentrating a sterilizer a vaporization chamber for vaporizing the sterilizer a metering tube into which the sterilizer is dispensed from the concentration chamber prior to the dispensation thereof into the vaporization chamber a vacuum appliance for drawing a vacuum within the sterilizing chamber and a first valve opened/closed for controlling the conduction of the sterilizing chamber and the metering tube. After the sterilizer has been dispensed into the metering tube from the concentration chamber, atmospheric air included within the metering tube is removed from the metering tube by opening the first valve.COPYRIGHT: (C)2014,JPO&INPIT【課題】滅菌室に空気が入らないようにするための仕組みを提供すること。【解決手段】滅菌剤を濃縮する濃縮室と、滅菌剤を気化するための気化室と、前記気化室に投入する前に、前記濃縮室から滅菌剤が投入される計量管と、前記滅菌室を真空引きするための真空機器と、前記滅菌室と前記計量管との導通の制御するために開け閉めする第1弁とを備え、前記濃縮室から滅菌剤を計量管に投入した後に、当該計量管に含まれる大気を、前記第1弁を開けることで、前記計量管から取り除くことを特徴とする。【選択図】図7