NOVELTY - The electrode (101) for electrolysis of an electrolytic solution, comprises an electrode core (103) serving as a base, and fine prominences (102), which are formed on a surface of the electrode by electroplating and have a leaf-shaped form rising from the surface of the electrode core. The leaf-shaped form of the prominences have a minor-axis length of 5-100 nm, a major-axis length of 50-5000 nm and a height of 100-10000 nm. The electrode core has a form of a flat sheet, a corrugated sheet, a metal mesh, a porous body, a wire rod, a tube or a film, and is metal-bonded with the prominences.    USE - The electrode is useful for making a hydrogen electrode and an oxygen electrode of an electrolyzer for electrolysis of an electrolytic solution (claimed) to produce hydrogen from water.    ADVANTAGE - The electrode has high specific surface area and is not susceptible to an influence of gas bubbles generated upon water electrolysis, thus realizing an electrolyzer as a hydrogen producing apparatus capable of doing alkaline water electrolysis at high current density.    DETAILED DESCRIPTION - The electrode (101) for electrolysis of an electrolytic solution, comprises an electrode core (103) serving as a base, and fine prominences (102), which are formed on a surface of the electrode by electroplating, and have a leaf-shaped form rising from the surface of the electrode core. The leaf-shaped form of the prominences have a minor-axis length of 5-100 nm, a major-axis length of 50-5000 nm and a height of 100-10000 nm. The electrode core has a form of a flat sheet, a corrugated sheet, a metal mesh, a porous body, a wire rod, a tube or a film, and is metal-bonded with the prominences. The prominences are formed on opposite sides of the electrode core. The electrolytic solution used for the electroplating contains hydrocarbon additives, aliphatic additives or aromatic additives, where each additive has sulfonic acid group, and a concentration of 0.01-10 wt.% with respect to the total amount of the electroplating solution. INDEPENDENT CLAIMS are included for:    (1) a method for manufacturing an electrode for electrolysis of an electrolytic solution; and    (2) an electrolyzer.    DESCRIPTION OF DRAWING(S) - The diagram shows a sectional view of an electrode for electrolysis.    Electrode (101)    Fine prominences (102)    Electrode core. (103)