PROBLEM TO BE SOLVED: To provide a steam sterilizer including a vapor-liquid separator for executing vapor-liquid separation based exclusively on the force of a steam.SOLUTION: The steam sterilizer 1 includes a vapor-liquid separator 30 possessing a flow inlet 32 for streaming, into a steam feeding tube 20, a steam from a boiler 16 and a flow outlet 33 for streaming the steam into a chamber 11 and constituted by fitting, to a rotation axle 34, multiple blades 35 rotated by a steam, and when a steam streams into the same, the liquid component thereof becomes adhered to the rotated blades 35, and the steam alone moves toward the chamber.COPYRIGHT: (C)2014,JPO&INPIT【課題】蒸気の力のみによって気液分離を行う気液分離器を備えた蒸気滅菌器を提供することを目的とする。【解決手段】蒸気滅菌器1は、給蒸管20内にボイラー16からの蒸気が流入する流入口32と、チャンバー11へと蒸気を流出する流出口33を有し、蒸気によって回転する複数の羽根35が回転軸34に取り付けられている気液分離器30を備えており、蒸気の流入によって回転する羽根35に液体が付着し、蒸気のみチャンバーへと向かう。【選択図】図3