Cell stack device

A cell stack device comprising:

• a manifold including a fuel gas supply chamber and a fuel gas collection chamber;
• a fuel cell extending upward from the manifold;
• and
• an oxygen-containing-gas ejection portion that is disposed upward of the center of the fuel cell and is configured to eject oxygen-containing gas toward the fuel cell,
• wherein the fuel cell includes
• a flat support substrate, and
• a power generation element portion disposed on a main surface of the support substrate,
• the support substrate includes
• at least one first gas channel that is connected to the fuel gas supply chamber and extends upward from the fuel gas supply chamber, and
• at least one second gas channel that is connected to the fuel gas collection chamber, extends upward from the fuel gas collection chamber, and is connected to the first gas channel in an upper end portion of the fuel cell.