SOLID OXIDE FUEL CELL BATTERY

[Means for Solution] A solid oxide fuel cell apparatus including a fuel cell having a plate-shaped first solid electrolyte body, a fuel electrode provided on one side of the first solid electrolyte body and coming in contact with fuel gas, and an air electrode provided on the other side of the first solid electrolyte body and coming in contact with oxidizer gas. The solid oxide fuel cell apparatus further includes a cell-follow-up deformation member located on at least one of opposite sides of the fuel cell with respect to a first stacking direction along which the fuel electrode, the first solid electrolyte body, and the air electrode are stacked together. The cell-follow-up deformation member deforms according to a deformation of the fuel cell on the basis of at least one of physical quantities including differential thermal expansion coefficient and differential pressure.