PURPOSE: To provide an excrement storage bag usable in the environment where a flush toilet cannot be used over a wide range of area, due to the occurrence of a serious disaster.

CONSTITUTION: This bag is formed out of a bag section having a sealable upper open/close end, and an excrement treatment agent sprayed on the excrement after the use of the bag. According to this construction, therefore, the excrement can easily be treated in an emergency, and freedom from odor can be ensured. Also, the excrement can temporarily be stored until a normal condition is restored from a disaster, and a large amount of excrement can be stored and transported. Also, the excrement can be incinerated, together with the bag.