Fuel cell

A fuel cell comprising:

• an electrode structure including an electrolyte membrane, an anode electrode, and a cathode electrode;
• an anode-side separator having a fuel supply flow path for supplying liquid fuel to the anode electrode;
• a cathode-side separator having an oxidant supply flow path for supplying an oxidant to the cathode electrode;
• and
• a single cell in which the electrode structure is disposed between the anode-side separator and the cathode-side separator, wherein
• the fuel cell generates electric power by an electrode reaction in the electrode structure, and
• the cathode-side separator has:
• an opposite surface provided in a position corresponding to the cathode electrode of the electrode structure;
• a back surface provided on a side opposite to the opposite surface in a plate thickness direction of the cathode-side separator;
• a passage configured to move water generated in the cathode electrode due to the electrode reaction from the opposite surface toward the back surface in the plate thickness direction;
• and
• a discharge structure configured to discharge the generated water moved to the back surface through the passage to an outside of the fuel cell.