PROBLEM TO BE SOLVED: To solve a problem that a facility and works for producing an aseptic packaging are complex since aseptic filling is easily and safely performed and there are risks of bad quality after production and putrefaction during distribution at normal temperature and to provide a means producing food products capable of being easily distributed at normal temperature.SOLUTION: An aseptic packaging having a strength suitable for distribution is obtained by that: Low energy electron beams of 150 kV or less being convenient for electron beams are used; a thin film having a large transmission quantity of low energy electron beams is used; irradiation is performed from one side; an overlapped inner surface is sterilized by the irradiation from an outer surface and filled; and an outer layer sheet is attached.SELECTED DRAWING: Figure 3【課題】無菌充填を簡便にかつ安全に行おうとするもので、無菌包装物において、製造後に不良となる危険、常温流通中に腐敗する危険があり、設備と作業が煩雑であるという問題を解消し、簡便に常温流通可能な食品の製造が出来る手段を提供する。【解決手段】簡便な電子線である低出力で150kV以下の低エネルギー電子線を使用する。低エネルギー電子線の透過量が大きい薄いフィルムを使用し、一方より照射する。外面より照射して重なり内面を殺菌して次に充填する、これに外層シートを添わせて、流通に適した強度の無菌包装物を得る。【選択図】図3