Fuel cell stack having tightening members

A fuel cell stack including a stack body formed by stacking a plurality of fuel cells in a stacking direction and a pair of end plates provided at both ends in the stacking direction, the fuel cells each being formed by stacking a membrane electrode assembly and a rectangular separator, the membrane electrode assembly including a pair of electrodes and an electrolyte membrane interposed between the pair of electrodes, long sides of the pair of end plates being fixed together by tightening members, and

• a pressure application adjustment device capable of adjusting a tightening load applied to the stack body being provided in one of the end plates, wherein the tightening members each includes:
• one end as a bent portion provided at the one of the end plates, the bent portion being bent in a direction along a surface of the one of the end plates, and coupled to the pressure application adjustment device;
• another end as a wide portion provided at another one of the end plates, the wide portion having a width extended toward the long side of the other of end plates
• a body having a constant width between the long sides of the pair of end plates;
• and
• a pair of reinforcement plates at the other end of the tightening member, the reinforcement plates extending away from each other toward both ends of the long side of the other of the end plates to form the wide portion.