NOVELTY - A fuel cell (1) has electric power generation element (30) having a solid oxide electrolyte layer (31), air electrode (32a) containing a perovskite-type oxide and a fuel electrode (33a), a separator (10) arranged on the air electrode and having a separator main component (11) and an interconnectors (13,14), and an intermediate layer (15) disposed between the separator main component and the air electrode for suppressing diffusion of a constituent element of the air electrode into the separator main component.    USE - Fuel cell e.g. solid oxide fuel cell, molten carbonate fuel cell, phosphoric acid fuel cell and polymer electrolyte fuel cell.    ADVANTAGE - The fuel cell has excellent reliability, and is manufactured with high productivity. The diffusion of constituent element of the air electrode into the separator main component in the fuel cell is effectively suppressed by the intermediate layer, even when integral baking is performed.    DETAILED DESCRIPTION - A fuel cell has electric power generation element having a solid oxide electrolyte layer, air electrode containing a perovskite-type oxide formed on one surface of a solid oxide electrolyte layer and a fuel electrode formed on the other surface of solid oxide electrolyte layer, a separator arranged on the air electrode and having a separator main component and an interconnectors arranged in the separator main component and connected to the air electrode, and an intermediate layer disposed between the separator main component and the air electrode for suppressing diffusion of a constituent element of the air electrode into the separator main component. The separator is a section-forming the flow path (52a) which faces the air electrode.    DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of fuel cell.    Fuel cell (1)    Separator (10)    Separator main component (11)    Interconnectors (13,14)    Intermediate layer (15)    Electric power generation element (30)    Solid oxide electrolyte layer (31)    Air electrode (32a)    Fuel electrode (33a)    Flow path (52a)