Adsorptive ultra-fine metal particles having a bond between an organic acid component and a metal, and exhibiting an infrared absorption peak derived from the bond between the organic acid component and the metal near 1518 cm -1 . The adsorptive ultra-fine metal particles are capable of exhibiting excellent deodorizing property and VOC-adsorbing property without impairing properties and formability of the resin. The invention is further concerned to an adsorptive resin composition and an adsorptive coating material containing the adsorptive ultra-fine metal particles and are capable of forming shaped resin articles or coatings.
