NOVELTY - A solution containing catalyst metal (2) is added to dispersion liquid containing an electroconductive support (1), reduced, dried, heat-processed, metalation of catalyst metal is attained, and intermediate powder of catalyst support is generated. A reducing solution is injected to the intermediate powder, filtered, and dried, to obtain catalyst-supporting carrier (3). The catalyst-supporting carrier is dispersed in solution containing antioxidant (4), moisture content is evaporated, and antioxidant is adhered to the surface of the catalyst-supporting carrier and stored.    USE - Manufacture and storage of catalyst-supporting carrier used for forming electrode catalyst for fuel cell.    ADVANTAGE - The catalyst-supporting carrier is economically manufactured and stored. The oxidation of catalyst-supporting carrier is suppressed even when stored in reduction state which is exposed in atmospheric condition during usage. The activity of catalyst metal is effectively maintained during manufacture and storage of catalyst-supporting carrier. The antioxidant is washed by simple method during usage.    DETAILED DESCRIPTION - A solution containing catalyst metal (2) is added to dispersion liquid containing an electroconductive support (1), reduced, dried, heat-processed, metalation of catalyst metal is attained, and intermediate powder of catalyst support is generated. A reducing solution is injected to the intermediate powder, obtained suspension is filtered, and dried, to obtain catalyst-supporting carrier (3). The catalyst-supporting carrier is dispersed in a solution containing antioxidant (4), moisture content is evaporated, and antioxidant is adhered to the surface of the catalyst-supporting carrier and stored. The storage state is released, and antioxidant is removed from the surface of the catalyst-supporting carrier during usage.    DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart explaining manufacture of catalyst support carrier.    Electroconductive support (1)    Catalyst metal (2)    Catalyst-supporting carrier (3)    Antioxidant (4)