PROBLEM TO BE SOLVED: To provide a package natto having an improved quality, in the package natto in which steamed soybeans implanted with Bacillus natto are stored in a natto storage container body with an opened upper side, and which is shipped to the market by closing the upper side opening of the natto container body by a lid body and in the state, fermenting the steamed soybeans by the Bacillus natto.SOLUTION: A package natto is such that: the entire upper side surface of steamed soybeans implanted with Bacillus natto and stored in a natto storage container body with an opened upper side is covered with a covering film of adhering the lower side surface to the upper side surface of the steamed soybeans and the upper side opening of the natto storage container body is closed by a lid body.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】上側が開口している納豆収容用容器本体に納豆菌が植えつけられた蒸煮済大豆が収容され、蓋体によって前記納豆収容用容器本体の上側開口を塞ぎ、この状態で前記蒸煮大豆を前記納豆菌により発酵させ、市場に出荷される包装納豆において品質の向上した包装納豆を提供する。【解決手段】上側が開口している納豆収容用容器本体に収容されている納豆菌が植菌されている蒸煮済大豆の上側表面全体が下側面を前記蒸煮済大豆の上側表面に密着させている被覆フィルムによって覆われ、前記納豆収容用容器本体の上側開口が蓋体で塞がれている包装納豆。【選択図】図2