It is an object of the present invention to provide an odor reducing agent which can be easily added with less influence on good aroma and taste other than odor components in food and food ingredients. An odor reducing agent comprising a soybean extract satisfying the following requirements A) to C) as an active ingredient: A) the raw material of the soybean extract is whole fat soybean which has been heat-treated beforehand； B) The lipid content in the extract is 15% by mass or less in the solid content, C) the content of the protein to the carbohydrate in the soybean extract is 100 to 200% by mass.本発明は、食品や食品原料中の臭気成分以外の良好な香気や味への影響が少なく、簡単に添加できる臭気低減剤を提供することを目的とする。 次のＡ）～Ｃ）の要件を満たす大豆抽出物を有効成分とする、臭気低減剤、Ａ）該大豆抽出物の原料が、予め加熱処理された全脂大豆であること、Ｂ）該大豆抽出物中の脂質含量が、固形分中１５質量％以下、Ｃ）該大豆抽出物中の炭水化物に対する蛋白質含量が、１００～２００質量％。
