PROBLEM TO BE SOLVED: To provide a taste improver capable of adding and enhancing fat flavor by adding a small amount of the same to oil and fat-containing drink and food, an oil and fat-containing drink and food using the improver, a flavoring composition for oil and fat-containing drink and food and a taste improvement method of the oil and fat-containing drink and food.SOLUTION: There is provided a taste improver for oil and fat-containing drink and food consisting of methyl branch saturated aliphatic aldehyde represented by the general formula (1), where m and n are both integer, m is 0 or 1 and m+n is 7 to 12.SELECTED DRAWING: None【課題】 油脂含有飲食品に少量添加することで脂肪風味を付与し増強することができる呈味改善剤、当該改善剤を用いた油脂含有飲食品、油脂含有飲食品用の香味料組成物、及び油脂含有飲食品の呈味改善方法を提供することである。【解決手段】 下記一般式（１） 【化１】（上記式中、ｍとｎはともに整数であり、ｍは０又は１かつｍ＋ｎが７～１２である）で表されるメチル分岐飽和脂肪族アルデヒドからなる油脂含有飲食品の呈味改善剤。【選択図】なし
