Abstract: A stack structure for a planar solid oxide fuel cell is provided in the present specification, the stack structure including: one or two or more stacks in which two or more cells each having an anode, a solid electrolyte, and a cathode are laminated via a separator, the one or two or more stacks including: an anode gas flow channel which supplies anode gas to the anode; a cathode gas flow channel which supplies cathode gas to the cathode; and a cooling gas flow channel which is independent of the cathode gas flow channel, wherein the cooling gas flow channel supplies cooling gas to at least one of opposing surfaces of the cells of the one or two or more stacks in a laminating direction.

Abstract: A stack structure for a solid oxide fuel cell includes a plurality of stacked single cells, each having a fuel electrode layer including a fuel electrode and an air electrode layer including an air electrode, the fuel electrode layer and the air electrode layer being arranged opposite each other on either side of a solid electrolyte, separators arranged between the stacked single cells to separate the single cells, and non-porous seal parts located within the fuel electrode layer and the air electrode layer, are equivalent to either the separators or the solid electrolyte at least in terms of thermal expansion and contraction characteristics, and are integrated with an edge of the fuel electrode or an edge of the air electrode, and also with the adjacent separator and the adjacent solid electrolyte.