TECHNOLOGY FOCUS - METALLURGY - Preferred Method: In the method, the metal other than silver is produced through reduction by silver. Preferred Dispersion: The dispersion contains the metal nanowire whose long-axis length is greater than or equal to 10 mu m, and is present in an amount of greater than or equal to 0.01 mass%. Preferred Components: The metal other than silver in the metal nanowire is present in an amount of 0.5-30 atomic % to the amount of silver; and is selected from gold, palladium, iridium, platinum, and osmium. EXAMPLE - Ethylene glycol (30 ml) was put in flask and heated at 160 degrees C. Ethylene glycol solution (18 ml) containing K-30 (RTM: polyvinylpyrrolidone) (36 mM), iron acetylacetonate (3 mu M), and sodium chloride (60 mu M), and an ethylene glycol solution (18 ml) containing silver nitrate (24 mM) were added into ethylene glycol in the flask at a rate of 1 ml/minute. The mixture was heated at 160 degrees C for 60 minutes, and then cooled to room temperature. The resulting mixture was diluted with water, centrifuged, and purified until the conductivity reached to less than or equal to 50 mu S/cm, to give an aqueous dispersion. The silver nanoparticles thus obtained were in the shape of a wire. The aqueous dispersion was dried by heating at 550 degrees C and then dispersion was designated comparative dispersion and form comparative metal nanowire. A comparative dispersion, 0.01M aqueous solution of palladium nitrate was additionally added to ethylene glycol. The resulting mixture was heated at 90 degrees C for one hour, cooled to room temperature, and then purified to give test aqueous dispersion. The metal nanowires thus obtained from test aqueous dispersion. The test/comparative dispersion was tested for transmittance, surface resistively immediately after production, surface resistively after a lapse of time and stability. The test/comparative dispersion showed transmittance of 82/81%, surface resistively immediately after production of 97/105 ohms/square, surface resistively after a lapse of time of 104/1900 ohms/square and stability of 4/2, respectively.