Provided is a simple cooling body capable of quickly obtaining a low temperature and maintaining a moderate low temperature for a long time without excessive cooling. A partition wall 2 is provided in a bag body made of a resin sheet to provide at least a first storage part 3 and a second storage part 4, and the first storage part and the second storage part 4 are applied by applying a force from the outside. The second accommodating portion can be communicated. A powdery cooling reactant is accommodated in the first accommodating portion, a cooling base and the inner bag 5 are accommodated in the second accommodating portion, and the inner bag is gradually released from the cooling base. To. [Selection] Figure 1【課題】速やかに低温が得られると同時に、過度に冷えすぎることなく適度な低温を長時間にわたって維持できる簡易冷却体を提供する。【解決手段】樹脂シート製の袋体内に隔壁部２を設けて少なくとも第一の収容部３と第二の収容部４を設け、外部から力を付加することによって該第一の収容部と該第二の収容部を連通可能とする。該第一の収容部に粉末状の冷却反応剤を収容し、該第二の収容部に冷却基剤と内部袋体５を収容するとともに、該内部袋体は冷却基剤を徐放するようにする。【選択図】図１
