PROBLEM TO BE SOLVED: To provide a silico-alumino-phosphate of an SAV structure containing copper and having a high solid acid amount, suitable for nitrogen oxide reduction catalyst.SOLUTION: Provided is a silico-alumino-phosphate of an SAV structure that has a solid acid amount of 0.90 mmol/g or more and contains copper. The silico-alumino-phosphate of the SAV structure containing copper can be obtained by a production method characterized in that it has a mixing step of mixing the silico-alumino-phosphate of the SAV structure and copper-containing alcohol.