To provide a package of medical system constituted of at least a plurality of bags which accomplish the thermal sterilization treatment as the medical system remains packaged to enable the sufficient thermal sterilization of the package without the denaturalization of the chemicals in a chemical bag housed in the package material of the medical system while improving the production operability of the packaging process and a circuit which enables the mounting of the bags individually thereon and a thermal sterilization method for the medical system package.

In the medical system and its production method, the medical system is constituted of at least the plurality of bags and a circuit which enables the mounting of the bags individual thereon. The system is packaged with a packaging material keeping another bag of the medical system inserted into a folded part so formed as to get at least one of the bags folded therein.