To obtain a catalyst for producing a lower fatty acid ester which has a high activity and also suppresses a side reaction and further has the catalytic activity that is not highly dependent on a physical property such as a specific surface area of a carrier. 活性が高く、副反応を抑制でき、しかも触媒活性が担体の比表面積等の物性に大きく依存しない低級脂肪酸エステル製造用触媒を得る。 - 特許庁