A fixed oxide fuel cell includes: a plurality of separators each having first and second opening portions, the separators being stacked such that a membrane electrode assembly is interposed between the separators and that the first opening portions are aligned coaxially in communication with each other to constitute a fuel gas manifold while the second opening portions are aligned coaxially in communication with each other to constitute an oxidant gas manifold, fuel gas and oxidant gas being supplied to the membrane electrode assembly via the fuel gas and oxidant gas manifolds; and silver plate layers provided between the separators for sealing joints in the fuel gas and oxidant gas manifolds.