Electrode catalyst for fuel cell, electrode for fuel cell including the electrode catalyst, and membrane electrode assembly and fuel cell including the same

Carbon-based carrier, and a fuel cell electrode which comprises a catalyst metal supported on the carbon-based carrier, wherein the carbon-based carrier comprises a functional group which is bonded to the surface thereof, and to the functional group represented by one of Chemical Formula 1 or 2 catalyst, a fuel cell electrode, a membrane electrode assembly (MEA) and fuel cell including the same are provided: [Formula 1] [Chemical Formula 2] In the formula 1 or 2, R, R