A method for producing an electrode for an electrochemical element absorbs monomers for polymerization on a surface having a specific surface area of 100 to 3000 m2g−1 and having an average pore diameter in the range of 0.4 to 100 nm, performing electrolysis polymerization by applying pulse voltage, and forming a conductive polymer layer on the surface of the conductive porous material, forming a thin and uniform electrode film. In a method for producing an electrochemical element, a conductive polymer layer is formed on the conductive porous material by absorbing monomers for polymerization on a surface of a conductive porous material having a specific surface area and pore diameter as above forming a electrochemical cell by using the conductive porous material, the monomers are absorbed in the pores, putting the electrochemical cell and the electrolyte solution in an outer casing, and performing electrolysis polymerization of the monomers in the electrolyte solution.