Exhaust gas purification catalyst for lean burn engine

An exhaust gas purification catalyst for a lean burn engine, including two or more catalyst layers laminated on a three-dimensional structure

• wherein each of said catalyst layers comprises
• a noble metal, and
• a single-metal oxide of cerium or a composite oxide of cerium oxide and at least one selected from a group consisting of α-alumina (Al2O3), γ-alumina, δ-alumina, η-alumina, θ-alumina, titania (TiO2), lanthana (La2O3), and silica (SiO2),
• wherein an amount of ceria included in the single-metal oxide or the composite oxide per 1 L of the catalyst is 140 to 300 g/L, and in the whole catalyst, a proportion of the ceria is 50 to 98% by mass with respect to a whole coated amount,
• wherein the two or more catalyst layers comprises ceria in an amount of 50% by mass or more based on the total amount of ceria in said catalyst, and each catalyst layer comprises the noble metal in an amount of 0.1% by mass or more with respect to an amount of the ceria included in the same catalyst layer.