PROBLEM TO BE SOLVED: To provide a milk component-containing coffee beverage or tea beverage having excellent stability by remarkably suppressing generation of deposition during sterilization treatment and long-term storage and burnt at sterilization, and further to provide a stabilizer for a milk component-containing coffee beverage or tea beverage capable of adding high stability in a wide range without any limitation on recipes of beverages (such as the amount of coffee, the amount of tea, the content of milk component and the like).SOLUTION: Carrageenan having a μ component and a ν component is used as a stabilizer for a coffee beverage or a tea beverage.COPYRIGHT: (C)2014,JPO&INPIT【課題】殺菌処理及び長期保存下における沈殿の発生、及び殺菌時に生じる焦げ付きが有意に抑制され、優れた安定性を有するコーヒー飲料又は紅茶飲料を提供する。更には、飲料の処方(コーヒー含量、紅茶含量、乳成分含量等)に制約を受けることなく、幅広い範囲で高い安定性を付与できる、乳成分含有コーヒー飲料用又は紅茶飲料用の安定剤を提供する。【解決手段】乳成分含有コーヒー飲料用又は紅茶飲料用の安定剤として、μ成分及びν成分を有するカラギナンを用いる。【選択図】図1