CAST PRODUCT HAVING ALUMINA BARRIER LAYER

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To provide a cast product having an alumina barrier layer and method for producing the same. A cast product having an alumina barrier layer of the present invention is a cast product in which an alumina barrier layer containing Al 2 O 3 is formed on the surface of a cast body, and the cast body contains C : 0.3 to 0.7 mass%, Si : 0.1 to 1.5 mass%, Mn : 0.1 to 3 mass%, Cr : 15 to 40 mass%, Ni : 20 to 55 mass%, Al : 2 to 4 mass%, rare earth element : 0.005 to 0.4 mass%, W : 0.5 to 5 mass% and/or Mo : 0.1 to 3 mass%, and 25 mass% or more of Fe in the remainder and an inevitable impurity, and 80 mass% or more of the rare earth element is La.