Fuel cell

A fuel cell, comprising:

• a polymer electrolyte membrane;
• a catalyst layer provided on the polymer electrolyte membrane;
• a gas diffusion layer provided on the catalyst layer;
• a frame member provided on an outer circumferential region of the polymer electrolyte membrane positioned on an outer side relative to an outer edge portion of the gas diffusion layer as seen from a thickness direction of the polymer electrolyte membrane;
• a separator provided on the gas diffusion layer, the separator having a close attachment region closely attaching to the frame member;
• and
• a gasket provided so as to seal between the separator and the frame member on an outer side relative to the close attachment region as seen from the thickness direction, wherein
• an outer edge portion of the catalyst layer is positioned on an outer side relative to the outer edge portion of the gas diffusion layer and on an inner side relative to a center portion of the gasket as seen from the thickness direction.