PROBLEM TO BE SOLVED: To provide a starch-derived emulsion stabilizer which exhibits an excellent emulsion stabilizing performance, is capable of being used for a wide range of addition purposes using starch which keeps the safety as food established and is purchasable easily, and further exhibits an oil/fat oxidation inhibiting effect.SOLUTION: The emulsion stabilizer for an oil/fat containing composition comprises a starch dispersion obtained by dissolving and gelatinizing starch by using waxy corn starch or corn starch as a primary material and irradiating the resulting product with ultrasonic waves. Alternatively, the emulsion stabilizer comprises a dried product obtained by dissolving and gelatinizing starch by using waxy corn starch or corn starch as a primary material, irradiating the resulting product with ultrasonic waves and drying a starch dispersion obtained by the above irradiation with the ultrasonic waves.COPYRIGHT: (C)2008,JPO&INPIT【課題】食品としての安全性が確立され調達容易なデンプンを原料として、良好な乳化安定性を発揮すると共に広汎な添加目的に利用可能であり、さらに油脂分の酸化抑制効果も発揮しうるデンプン由来の乳化安定剤を提供する。【解決手段】油脂含有組成物のための乳化安定剤であって、ワキシーコーンスターチまたはコーンスターチを主原料とするデンプンを溶解糊化しこれに超音波を照射したデンプン分散物からなる。もしくは、ワキシーコーンスターチまたはコーンスターチを主原料とするデンプンを溶解糊化しこれに超音波を照射したデンプン分散物を乾燥して得られた乾燥物からなる。【選択図】図1