PROBLEM TO BE SOLVED: To provide an on-surface three-dimensional shape forming method for forming an on-surface three-dimensional shape having three-dimensional ruggedness on the surface of a material to be processed, to provide an on-surface three-dimensional shaped article formed by the method, and to provide an on-surface three-dimensional shape forming apparatus for use in fabricating the on-surface three-dimensional shaped article by the method.;SOLUTION: The on-surface three-dimensional shape forming apparatus includes: a metal foam (11) which is composed of a fine metal wire and constitutes an electrode; and a power source device which generates pulsed electric discharge by applying a voltage between the metal foam (11) and a workpiece (3). The voltage is applied between the metal foam (11) of a nominal hole diameter ≥200 μm to ≤1,000 μm and the workpiece (3) to cause the pulsed electric discharge having a pulse width ≥30 μm to ≤500 μm to be generated between both, whereby a three-dimensional network structure is formed on the surface of the workpiece (3).;COPYRIGHT: (C)2009,JPO&INPIT
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