FUEL CELL

A fuel cell includes a reinforcing frame (140) that supports an outer edge portion of a membrane electrode assembly, and first and second separator plates (150, 160) that sandwich the membrane electrode assembly and the reinforcing frame. The first separator plate (150) includes a seal line forming protruding portion (152) that is pressed against the second separator plate of an adjacently arranged fuel cell when the fuel cell is stacked, and a first joining portion (154) provided on both sides of the seal line forming protruding portion. The second separator plate (160) includes a receiving portion (162) that is pressed against the seal line forming protruding portion of the first separator plate. The fuel cell includes a slant inhibiting portion (158, 168) provided on at least one side of both sides of the seal line forming protruding portion and the receiving portion.