Fuel cell

A fuel cell comprising:

• a membrane electrode assembly, the membrane electrode assembly including an electrolyte membrane, and a first electrode and a second electrode provided on both surfaces of the electrolyte membrane, respectively;
• a first separator stacked on the first electrode of the membrane electrode assembly;
• and a second separator stacked on the second electrode of the membrane electrode assembly, wherein a first flow field is formed between the first separator and the first electrode, a first reactant gas is supplied to the first flow field, a second flow field is formed between the second separator and the second electrode, and a second reactant gas is supplied to the second flow field,
• wherein a frame member is provided around an outer peripheral portion of the membrane electrode assembly, the frame member being configured to be held between the first separator and the second separator;
• the frame member includes a frame member inner peripheral portion joined to the membrane electrode assembly and a frame member outer peripheral portion which is continuous with the frame member inner peripheral portion and thicker than the frame member inner peripheral portion;
• a height of the second flow field formed by the second separator, from the membrane electrode assembly is larger than a height of the first flow field formed by the first separator, from the membrane electrode assembly;
• and
• a central position of the membrane electrode assembly in a thickness direction and a central position of the frame member outer peripheral portion in a thickness direction are offset from each other.