NOVELTY - A material has granular macromolecules containing co-catalyst metal held with a catalyst metal by a coordinate bond via a functional group of the polymer chain. Reduction fixed processing of the metal component coordinated to the granular macromolecules is carried out, and the macromolecules are impregnated into a support base material. The polymeric portion is combusted and catalyst metal and co-catalyst metal are supported.    USE - Used for the production of a catalyst for exhaust gas purification, the electrode catalyst of a fuel cell and a fuel modification catalyst and for a fuel reformer for motor vehicles.    ADVANTAGE - The process provides a highly efficient catalyst having high catalyst activity.    DETAILED DESCRIPTION - A material having a structure in which several polymer chains are radially extended from the center to the periphery direction and containing granular macromolecules is used to prepare a catalyst. The granular macromolecules contain a co-catalyst metal held with a catalyst metal by a coordinate bond via a functional group of the polymer chain. Reduction fixed processing of the metal component coordinated to the granular macromolecules is carried out, and the macromolecules are impregnated into a support base material. The polymeric portion is combusted and catalyst metal and co-catalyst metal are supported.    An INDEPENDENT CLAIM is included for a catalyst preparation material, which contains the granular macromolecules. A functional group contained in the granular macromolecules is a hydroxyl group, carbonyl group, aldehyde group, carboxyl group, nitro group, cyano group, amino group, imide group, imino group and/or sulfonic acid group. The catalyst metal is lanthanum, cerium, zirconium, titanium, aluminum, manganese, iron, nickel, cobalt and/or zinc, and platinum, promethium, palladium, rhodium, rubidium, iridium, silver, gold, manganese, iron, nickel, cobalt, zinc and/or copper. The co-catalyst metal is different from the catalyst metal.