A method for producing a catalyst for catalytic cracking of a hydrocarbon oil easily produces a catalyst for catalytic cracking of a hydrocarbon oil that exhibits high cracking activity with respect to a heavy hydrocarbon oil, and can produce a gasoline fraction having a high octane number in high yield. The method includes preparing an aqueous slurry that includes 20 to 50 mass% of a zeolite having a sodalite cage structure, 10 to 30 mass% (on a SiO 2 basis) of a silica sol, 0.1 to 21 mass% (on an Al 2 O 3 ·3P 2 O 5 basis) of mono aluminum phosphate, and 5 to 65 mass% of a clay mineral on a solid basis, aging the aqueous slurry for 5 to 200 minutes, and spray-drying the aqueous slurry.
