To efficiently produce a gold nanoparticle-carrying powder that has only a minimum amount of an additive such as a dispersant, and is free of impurities.SOLUTION: The present invention provides a method for producing gold nanoparticle-carrying powder that is obtained by: adding a base powder for carrying gold nanoparticles thereon, to a mixture solution having an ammonia solution added to a solution containing gold ions； disposing at least two electrodes in a gas above the liquid level of the mixture solution； applying voltage to between electrodes in a rare gas atmosphere； and generating plasma between the electrodes and the liquid level. There is also provided a gold nanoparticle-carrying powder thereof.SELECTED DRAWING: Figure 1【課題】分散剤等の添加物をできるだけ抑え、不純物の無い金ナノ粒子担持粉体を効率良く生成すること。【解決手段】金イオンを含む水溶液にアンモニア水溶液を添加した混合水溶液に、金ナノ粒子を担持させる母粉体を加え、少なくとも二本の電極を混合水溶液の液面上部の気中に配置して、希ガス雰囲気下で電極間に電圧を印加して電極－液面間でプラズマを発生させることにより得られる金ナノ粒子担持粉体の製造方法、及びその金ナノ粒子担持粉体。【選択図】図１
