To provide a two-pack discharge system which can be manufactured in a simple process and handled easily and can be divided and used two or more times.

This two-pack discharge system 10 is composed of the first vessel 11 packed with the contents and the second vessel 12 which is connected to a connection part 17 of the vessel 11 at the bottom by a connecting member 13 to be attached/detached freely and which is packed with the contents different from those in the vessel 11. The vessel 11 is provided with the first valve 16 arranged at the upper end of a vessel main body 15, a dip tube 19 for communicating the valve 16 with the internal space of the body 15 and a connection pipe 20 for communicating the valve 16 with the part 17.