PROBLEM TO BE SOLVED: To provide a fuel cell in which vibration resistance and impact resistance are enhanced during conveyance of a SOFC cartridge that is an aggregation of cell stacks.SOLUTION: In a fuel cell where a core 50A is inserted into a cell stack 40 in order to accelerate the flow velocity of a fluid flowing in the cylindrical cell stack 40, the core 50A is inserted from the upper end opening of the cell stack 40, and mounted on a stack upper end face 40c by means of three planar claws 52A extending radially in the horizontal direction from the central part of the upper end face. The planar claw 52A is provided with a bend 53 inclining downward in the axial center direction from the position of a cell stack inner wall surface 40a.
