The present invention relates to smoothly perform the fermentation of cooked beans packed in a container, yet the drying of the surrounding mass of boiled beans. As well as prevent, to provide a natto container that prevent it from reddish by air burnt. As well followed by providing the first step fitting portion 24 in A container body 2 of the flange 23, It provides a rib 27 of a large number of vertical to the side wall portion 26. Concave on the inner side of the flange 43 in the lid 4. Providing the second stepped engagement portion 44 on the side wall of the outside is provided with a section 41. To the container body 2. When covered with the cover 4, the stepped fitting portions 24 and 44 of both are in close contact, the air from inside the gap. It will not go into. In addition, the bottom 22 of the container body 2 provided with a four-sided pyramid-shaped protrusion 28, its surface. In by providing a large number of small projections 29, natto 6 filled is wider towards the foot of the projections 28. Wants to become a flat, to penetrate the air is good for the fermentation to the center of the lumps of natto 6 fermentation of natto. it is possible to sufficiently perform.BACKGROUND 4.【課題】 容器に充填した煮豆の発酵を順調に行わせ、しかも煮豆の塊の周囲の乾燥を防ぐと共に、空気焼けにより赤味を帯びるのを防ぐ納豆容器を提供する。【解決手段】容器本体2のフランジ23に続いて第1段差嵌合部24を設けると共に、その側壁部26に多数の縦向きのリブ27を設ける。蓋体4にはフランジ43の内側に凹部41を設けると共にその外側の側壁に第2段差嵌合部44を設ける。この容器本体2に蓋体4を被せた場合、両者の段差嵌合部24、44は密着して、その隙間から空気が内部に入らなくなる。また、容器本体2の底面22に四角錐状の突起部28を設け、その表面に多数の小突起29を設けることによって、充填された納豆6は突起部28の裾の方に広がって扁平となり、納豆6の塊りの中心部まで発酵用の空気がよく浸透して納豆の発酵を十分に行うことができる。【選択図】 図4
