A fuel cell stack including a stack body formed by stacking a plurality of solid oxide fuel cells in a stacking direction, the solid oxide fuel cells each formed by stacking an electrolyte electrode assembly between separators, the electrolyte electrode assembly including an anode, a cathode, and an electrolyte interposed between the anode and the cathode. the separator comprising: a sandwiching section sandwiching the electrolyte electrode assembly, a fuel gas channel for supplying a fuel gas along an electrode surface of the anode, and an oxygen-containing gas channel for supplying an oxygen-containing gas along an electrode surface of the cathode being formed separately in the sandwiching section; a reactant gas supply section, at least a fuel gas supply passage for supplying the fuel gas to the fuel gas channel or an oxygen-containing gas supply passage for supplying the oxygen-containing gas to the oxygen- containing gas channel extending through the reactant gas supply section in the stacking direction; the fuel cell stack comprising: a base member provided at one end of the stack body in the stacking direction; a mounting member provided at another end of the stack body in the stacking direction for applying a load to the stack body in the stacking direction; a fuel cell support member positioned between the mounting member and the stack body, the fuel cell support member being made of composite material of alumina fiber and vermiculite, wherein the fuel cell support member includes a first support section for applying a load to the sandwiching section in the stacking direction at a position corresponding to the electrolyte electrode assembly, and a second support section for applying a load to the reactant gas supply section in the stacking direction; and the density of the first support section is smaller than the density of the second support section, wherein the amount of vermiculite contained in the first support section is smaller than the amount of vermiculite contained in the second support section. a sandwiching section sandwiching the electrolyte electrode assembly, a fuel gas channel for supplying a fuel gas along an electrode surface of the anode, and an oxygen-containing gas channel for supplying an oxygen-containing gas along an electrode surface of the cathode being formed separately in the sandwiching section; a reactant gas supply section, at least a fuel gas supply passage for supplying the fuel gas to the fuel gas channel or an oxygen-containing gas supply passage for supplying the oxygen-containing gas to the oxygen- containing gas channel extending through the reactant gas supply section in the stacking direction; the fuel cell stack comprising: a base member provided at one end of the stack body in the stacking direction; a mounting member provided at another end of the stack body in the stacking direction for applying a load to the stack body in the stacking direction; a fuel cell support member positioned between the mounting member and the stack body, the fuel cell support member being made of composite material of alumina fiber and vermiculite, wherein the fuel cell support member includes a first support section for applying a load to the sandwiching section in the stacking direction at a position corresponding to the electrolyte electrode assembly, and a second support section for applying a load to the reactant gas supply section in the stacking direction; and the density of the first support section is smaller than the density of the second support section, wherein the amount of vermiculite contained in the first support section is smaller than the amount of vermiculite contained in the second support section. a base member provided at one end of the stack body in the stacking direction; a mounting member provided at another end of the stack body in the stacking direction for applying a load to the stack body in the stacking direction; a fuel cell support member positioned between the mounting member and the stack body, the fuel cell support member being made of composite material of alumina fiber and vermiculite, wherein the fuel cell support member includes a first support section for applying a load to the sandwiching section in the stacking direction at a position corresponding to the electrolyte electrode assembly, and a second support section for applying a load to the reactant gas supply section in the stacking direction; and the density of the first support section is smaller than the density of the second support section, wherein the amount of vermiculite contained in the first support section is smaller than the amount of vermiculite contained in the second support section.