A fuel cell stack includes a stack body having a plurality of power generation cells that are stacked together, a pair of end plates, a case, and a coupling bar provided on a lateral side of the stack body, between a pair of end plates for coupling the end plates together. Positioning structure is provided in an inner surface of the case and the coupling bar, for defining positions of the inner surface and the coupling bar with respect to each other. The coupling bar includes an engaging part which engages with engaged parts formed in the stack body, respectively, and an insulating resin layer provided on a side of the coupling bar including the engaging part closer to the stack body.