FUEL CELL STACK

A fuel cell stack includes a stack body including a plurality of power generation cells stacked together, a stack case storing the stack body, and an auxiliary device case storing a fuel cell auxiliary device. Two exhaust gas openings are provided in an upper part of the stack case. One exhaust gas opening is provided in an upper part of the auxiliary device case. An exhaust duct is connected to the only three exhaust gas openings in total.