The active material diffuser has with the container and the device for active material discharge, this device is designed in such a way that distribution facilities it is done to when using inside the container. The diffuser furthermore is arranged in apex of the container, at the same time at the time of non- use of this device the device the enclosure has the cover which is packed inside the container.活性物質拡散装置が容器と活性物質放出用装置とを備え、この装置は使用時には容器の内部に配設されるようになっている。拡散装置は更に、容器の頂部に配置され、かつこの装置の不使用時に装置を容器内部に囲い込むカバーを備える。