Electrode catalyst material and method of manufacturing the same

The invention provides an electrode catalyst material (10) in which a resistance loss is reduced by enhancing an electric conductivity as a whole of an electrode catalyst as well as suppressing a corrosion and a disappearance by a catalyst metal in a conductive catalyst support so as to prevent a dropout and an aggregation of a catalyst metal particle (13), and a method of manufacturing the same. The electrode catalyst material (10) in accordance with the present invention is an electrode catalyst material (10) for a fuel cell having a catalyst metal particle (13) and a carbon support (11) supporting the catalyst metal particle (13), in which a carbon support protection layer (12) including a metal element is formed in a coating manner on a surface of the carbon support (11), a silicone is included at 20 atomic % or more in the metal element contained in the carbon support protection layer (12), and the silicone exists in a state of an oxide and a carbide.