NOVELTY - An electrode comprises a catalyst layer(s) (203, 205) contacted with electrolyte membrane; and a gas diffusion layer contacted with separator. The catalyst layer includes a catalyst portion containing first catalyst particles dispersed in an ionomer binder resin; and an ionomer portion containing second catalyst particles dispersed in an ionomer binder resin and having a lower concentration of catalyst particles than the catalyst portion. The ionomer portion has a shape of a wall or pillars in the catalyst portion.    USE - An electrode for a fuel cell which is interposed between an electrolyte membrane and a separator having a fluid channel (claimed).    ADVANTAGE - The electrode has an improved ion conductivity, improved reaction surface area and increased durability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) preparation of electrode comprising preparing a catalyst portion forming ink and an ionomer portion forming ink having a lower concentration of catalyst particles than the catalyst portion forming ink; spraying the prepared first catalyst portion forming inkdrops and first ionomer portion forming inkdrops onto preset locations of an electrolyte membrane or a gas diffusion layer in an ink jet manner to form a layer; and stacking second catalyst portion forming inkdrops and second ionomer portion forming inkdrops onto the locations where the first catalyst portion forming inkdrops and the first ionomer portion forming inkdrops were sprayed to form a catalyst portion and an ionomer portion, respectively, and spraying repeatedly each of the second catalyst portion forming inkdrops and the second ionomer portion forming inkdrops in an ink jet manner to form a catalyst layer such that the ionomer portion has a shape of a wall or multiple pillars in the catalyst portion;    (2) membrane electrode assembly comprising an electrolyte membrane; and an anode electrode and a cathode electrode formed at opposite sides of the electrolyte membrane, each including a catalyst layer and a gas diffusion layer, where either the anode electrode or the cathode electrode, or both of the electrodes is the electrode for a fuel cell; and    (3) fuel cell comprising a stack including at least one membrane electrode assembly and a separator interposed between the membrane electrode assemblies; a fuel providing unit for providing a fuel to the stack; and an oxidant providing unit for providing an oxidant to the stack.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic plane view of a catalyst portion forming ink and an ionomer portion forming ink being sprayed onto an electrolyte membrane or a gas diffusion layer to form a wall in a catalyst portion.    Catalyst portion (21)    Ionomer portion (22)    Catalyst layers (203, 205)