Fuel cell

A fuel cell comprising:

• an electrolyte membrane;
• first and second catalyst layers respectively formed on first and second surfaces of the electrolyte membrane;
• and
• a separator disposed opposite to the electrolyte membrane with respect to the first catalyst layer, wherein
• the separator includes flow path grooves through which reaction gas flows between the separator and the first catalyst layer,
• the flow path grooves include:
• wavy grooves wavily extending in a first direction and arranged in a second direction orthogonal to the first direction;
• and
• first and second end grooves between which the wavy grooves are located in the second direction,
• the first catalyst layer includes first and second edges facing each other in the second direction,
• the first and second end grooves are respectively adjacent to the first and second edges of the first catalyst layer in the second direction,
• the first and second end grooves respectively extend in the first direction within first and second regions,
• the first and second regions extend in the first direction,
• each width of the first and second regions in the second direction is smaller than each amplitude of the wavy grooves, and
• each width of the first and second end grooves in the second direction is constant along the first direction and is smaller than each amplitude of the wavy grooves.