Abstract: An exhaust gas purification catalyst or the like may inhibit poisoning of a noble metal component by a Si-containing compound generated or detached from silicon carbide, may inhibit degradation of exhaust gas purification performances over a long period, and may have excellent long-term durability. An exhaust gas purification catalyst may have a stacked structure including at least a substrate and a first and second coat layer, in that order. The substrate may be selected from a silicon carbide carrier including silicon carbide and a silicon carbide-covering carrier on which a coating layer including silicon carbide is provided. The first coat layer may include a compound including one or more alkaline-earth metals selected from Mg, Ca, Sr, and Ba. The second coat layer may includes one or more platinum group elements selected from Rh, Pt, and Pd.