A fuel cell stack includes: a cell stacked body in which fuel cells are stacked in multiple layers; an end plate by which the fuel cells are fastened; and a dummy cell interposed between the cell stacked body and the end plate, wherein the end plate includes a gas inlet for introducing a reactant gas from an outside, and a gas outlet for discharging the reactant gas to the outside, and the dummy cell includes a gas supply manifold delivering the reactant gas having passed through the gas inlet to the cell stacked body, a gas exhaust manifold delivering the reactant gas having passed through the cell stacked body to the gas outlet, and a bypass channel connecting the gas supply manifold to the gas exhaust manifold and being partially curved to allow the condensed water to be collected.