Patent ID: 8357472

Claim:
A fuel cell system including: a fuel cell stack formed by stacking a plurality of power generation cells in a stacking direction, a reactant gas supply passage for supplying at least a fuel gas or an oxygen-containing gas as a reactant gas extending through the fuel cell stack in the stacking direction; and a reactant gas supply mechanism having an ejector for supplying the reactant gas to the reactant gas supply passage, and returning the reactant gas discharged from the fuel cell stack after consumption to the reactant gas supply passage, wherein the reactant gas supply mechanism includes a flow rectifier member for rectifying the reactant gas provided at a portion connecting the ejector and the reactant gas supply passage, and wherein the flow rectifier member is a cylindrical member, and the flow rectifier member connects a manifold provided at an end plate provided at one end of the fuel cell stack and a reactant gas outlet of the ejector, and the manifold is connected to the reactant gas supply passage.