A cell of the present disclosure includes a support body having a pillar shape, containing nickel, and including a gas-flow passage passing through an interior of the support body in a longitudinal direction, a first end portion including an outlet of the gas-flow passage, and a second end portion including an inlet of the gas-flow passage, a first electrode layer located upon the support body, a solid electrolyte layer located upon the first electrode layer, and a second electrode layer located upon the solid electrolyte layer. The support body has a lower metallic nickel content at the first end portion than at a central portion in the longitudinal direction. As such, the cell is capable of suppressing damage.