Disclosed is a sleeve sterilization method and apparatus that can shorten the process and reliably sterilize a sleeve for a paper container. A bottomed cylindrical paper container is formed by closing one surface of an open end of a sleeve, which is a cylindrical body having a wall surface formed by laminating paper, and sterilizing the paper container, A method of sterilizing the sleeve in the aseptic filling device 15 that performs filling and sealing, in the state where the sleeve is raised in a columnar shape, spraying hot air containing a sterilizing agent on the inner surface of the sleeve that becomes the bottom of the paper container, Sterilization of the inner surface of the bottom and heating for the blockage are performed simultaneously. [Selection] Figure 1【課題】紙容器用スリーブの殺菌において、工程を短縮でき、確実に殺菌することができるスリーブの殺菌方法及び装置を提供する。【解決手段】少なくとも紙を積層してなる壁面を有する筒状体であるスリーブ１の開放端の一方の面を閉塞して有底筒状の紙容器１０を成型し、当該紙容器の殺菌、充填及び密封を行う無菌充填装置１５における前記スリーブの殺菌方法であって、前記スリーブを柱状に起こした状態で、前記紙容器の底部となる前記スリーブの内面に殺菌剤を含む熱風を吹き付け、前記底部の内面の殺菌と前記閉塞のための加熱を同時に行う。【選択図】図１
