NOVELTY - The porous electrode has a carrier layer which is provided with a catalytic active material that is supported on an electrically conductive mesh (1). A proton conductive material is distributed on the electrically conductive mesh and is contacted to portion of catalytic active material. The electrically conductive mesh is provided with two sets of rectangular fibers (2,3) that are arranged straightly in parallel with each other. The sizes of pores of fibers are provided in the range between 20 and 3000 nanometers corresponding to the size of electrode.    USE - Porous electrode for fuel cell such as solid material polymer electrolyte fuel cell (claimed) used in industrial and automotive applications.    ADVANTAGE - The electrically conductive mesh is provided with fiber sets that are arranged straightly in parallel with each other, whose pore size are provided in preset range corresponding to size of electrode, such that the use of the noble metal can be reduced efficiently. The power densities and power levels can be maintained reliably. Since catalytic active material is provided, movement of the heavier liquid and gaseous species to and from the catalyst through the pores can be performed efficiently. The mass transport losses can be avoided. The pore size can be controlled, hence performance of solid-polymer-electrolyte fuel cells can be improved effectively. The properties of electrodes can be accurately controlled. Since electrically conductive mesh is provided, flow of the reactants and products in both directions perpendicular to and in the plane of the electrode can be facilitated.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) solid material polymer electrolyte fuel cell;    (2) method for manufacturing porous electrode; and    (3) method for manufacturing solid material polymer electrolyte fuel cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a plain view of the porous electrode.    Electrically conductive mesh (1)    Rectangular fibers (2,3)