fuel gas and oxidizing agent independently via the manifolds in the gasket provided separator 5 and the mea 6 when these gases were introduced through the reaction gas inlet ports in the end plates 10 as a result an electromotive force was produced between the electrodes in the mea 6 to generate electric power when an adequate load was applied to between the current collecting plates cooling water was supplied in a similar manner from the end plates 10 to the space formed between the gasket provided separator assemblies 5 c and 5 e via the manifold to remove heat generated as power was produced the intermediate 2 described in example 1 was a flat plate it may be replaced by the slit structured intermediate 2 a which is the intermediate 2 whose portion not contacting with the separator 1 is removed fig5 is a plan illustrating the slit structured intermediate 2 a and fig6 the intermediate 2 a assembled in a cooling cell the intermediate 2 a was machined by an adequate means e g punching to have a plurality of the slits 201 a by removing the portions not contacting with the separator 1 as shown in fig5 it was held by a pair of the gasket provided separators 5 in such a way that the rib apex in the gasket provided separator assembly 5 comes into contact with the corresponding lattice 202 a in the intermediate 2 use of the intermediate 2 a can increase cooling water passage cross section thereby reducing pressure loss resulting from flow of water with the result that the fuel cell has enhanced efficiency the intermediate 2 described in example 1 divided the space as the cooling water passage formed by.