CELL STACK DEVICE, MODULE, AND MODULE HOUSING DEVICE

A cell stack device may include a cell stack comprising a plurality of cells, a manifold configured to supply a reaction gas to the plurality of cells, and a reaction gas supply pipe connected to the manifold. The manifold may include an insertion portion configured to connect the reaction gas supply pipe to the manifold and a first joining portion configured to join the insertion portion and the reaction gas supply pipe. A module may include the cell stack device contained in a housing container. A module housing device may include the module, an auxiliary device configured to operate the module, and an external casing configured to contain the module and the auxiliary device therein.