Fuel cell stack

A fuel cell stack comprising:

• a stacked body comprising a plurality of separators and a membrane electrode assembly which are stacked in a stacking direction, the membrane electrode assembly including an electrolyte membrane and a pair of electrodes sandwiching the electrolyte membrane therebetween, the stacked body having a first end and a second end opposite to the first end in the stacking direction;
• a first terminal plate, a first insulator, and a first end plate disposed at the first end of the stacked body, a second terminal plate, a second insulator, and a second end plate being disposed at the second end of the stacked body, each of the first and second terminal plates being provided in a first recessed portion formed in each of the first and second insulators, each of the first and second insulators having a channel formed in an outer peripheral part of each of the first and second insulators;
• a fluid manifold through which a fluid is to flow in the stacking direction, the fluid including a fuel gas, an oxidant gas, a coolant, or a combination thereof;
• a fluid channel through which the fluid is to flow along a surface of the plurality of separators;
• a fluid hole provided in at least one separator among the plurality of separators to extend through the at least one separator in the stacking direction, the outer peripheral part of each of the first and second insulators being in contact with the at least one separator;
• a first connection passage connecting the fluid manifold and the fluid hole on a first side of the at least one separator;
• and
• a second connection passage connecting the fluid hole and the fluid channel on a second side opposite to the first side of the at least one separator, the channel of each of the first and second insulators forming a part of each of the first and second connection passages and connecting the fluid manifold and the fluid hole.