A fuel cell comprising: a flat-plate-like fuel cell main body which is formed by stacking a cathode layer, an electrolyte layer, and an anode layer, whose first main surface is a surface of one of the cathode layer and the anode layer, and whose second main surface is a surface of the other layer; a first current collector (45G, 46G) which is in contact with the first main surface; and a second current collector (45G, 46G) which is in contact with the second main surface, wherein: as viewed in a thickness direction of the fuel cell main body, at least a portion of a boundary of a second region of the second current collector (45G, 46G) corresponding to the second main surface is located within a boundary of a first region of the first current collector (45G, 46G) corresponding to the first main surface, and the remaining portion of the boundary of the second region is located within the boundary of the first region or on the boundary of the first region, the fuel cell being characterized in that: the second current collector (45G, 46G) is designed such that the second current collector (45G, 46G) compressively deforms more easily than the first current collector (45G, 46G). a flat-plate-like fuel cell main body which is formed by stacking a cathode layer, an electrolyte layer, and an anode layer, whose first main surface is a surface of one of the cathode layer and the anode layer, and whose second main surface is a surface of the other layer; a first current collector (45G, 46G) which is in contact with the first main surface; and a second current collector (45G, 46G) which is in contact with the second main surface, wherein: as viewed in a thickness direction of the fuel cell main body, at least a portion of a boundary of a second region of the second current collector (45G, 46G) corresponding to the second main surface is located within a boundary of a first region of the first current collector (45G, 46G) corresponding to the first main surface, and the remaining portion of the boundary of the second region is located within the boundary of the first region or on the boundary of the first region, the fuel cell being characterized in that: the second current collector (45G, 46G) is designed such that the second current collector (45G, 46G) compressively deforms more easily than the first current collector (45G, 46G). as viewed in a thickness direction of the fuel cell main body, at least a portion of a boundary of a second region of the second current collector (45G, 46G) corresponding to the second main surface is located within a boundary of a first region of the first current collector (45G, 46G) corresponding to the first main surface, and the remaining portion of the boundary of the second region is located within the boundary of the first region or on the boundary of the first region, the fuel cell being characterized in that: the second current collector (45G, 46G) is designed such that the second current collector (45G, 46G) compressively deforms more easily than the first current collector (45G, 46G). the second current collector (45G, 46G) is designed such that the second current collector (45G, 46G) compressively deforms more easily than the first current collector (45G, 46G).