A processing system for cell cultures for carrying out cell/tissue culturing processes in the field of regenerative medicine, etc. which is a processing system for cell cultures which prevents viruses and human-derived cells, etc. other than a culturing processing target from entering the interior of a closed space from outside of the system to maintain sterility, maintains sealability of the closed spaces of modules, and couples or detaches the plurality of modules in accordance with a wide variety of cell culturing processing steps so that cell culturing processes can be carried out by combining the plurality of culturing processing modules is provided.