The present invention provides a fuel cell stack capable of satisfactorily ensuring the strength of a resin-made fluid manifold itself and achieving weight reduction. The fuel cell stack (10) is provided with a second end plate (18b) at one end in the stacking direction of the stacked body (12as). A resin medium cooling manifold (72a) is provided on the second end plate (18b). The cooling medium supply manifold (72a) is provided with a plurality of recesses (82a) by means of a rib (83a) on a surface (74a (out)) which is in contact with the second end plate (18b).