The present invention provides a structure for casting containing an organic fiber, an inorganic fiber, inorganic particles (A) having an average particle diameter of 50 to 150 μm, and a binder (a), having a surface layer containing refractory inorganic particles (B) having an average particle diameter of 1 to 100 μm selected from metal oxides and metal silicates, a clay mineral, and a binder (b), on the surface of the structure.