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A micro lens molding piece includes a substrate having electrical conductivity at least on its surface. The surface is patterned with an insulation layer including at least one opening. An electro deposition start section is formed on the substrate and is exposed from the opening. An electro deposition start electrode is provided in the electro deposition start section and protrudes from the insulation layer by a prescribed length substantially determining a shape of a micro lens. A metal layer is electrically deposited in a shape of the micro lens by the electro deposition start electrode when electro deposition is performed.