FUEL CELL STACK

A fuel cell stack including a cell stacked body, a case surrounding the cell stacked body, and a guide member attached to an inner wall of the case to extend in a stacked direction of the cell stacked body and including an engaged portion protruding toward an edge portion of a separator. The separator includes an engagement portion engaging with the engaged portion, the inner wall includes a guide support portion supporting the guide member, and the guide support portion includes a first restriction portion restricting a movement of the guide member in a thickness direction of the inner wall perpendicular to the stacked direction, and a second restriction portion restricting a movement of the guide member in a direction perpendicular to the stacked direction and the thickness direction.