A fuel cell stack includes power generation cells stacked in a stacking direction. Each of the power generation cells includes a membrane electrode assembly and a separator. The membrane electrode assembly includes an electrolyte membrane, and electrodes between which the electrolyte membrane is sandwiched in the stacking direction. The separator is stacked on the membrane electrode assembly in the stacking direction. The power generation cells are sandwiched between end plates in the stacking direction. A resin fluid manifold member is disposed on one of the end plates opposite to the power generation cells in the stacking direction and through which a fluid is to flow. The resin fluid manifold member has a contact surface which is in contact with the one of the end plates. The resin fluid manifold member includes recessed portions provided in the contact surface and ribs provided between the recessed portions in the contact surface.