PROBLEM TO BE SOLVED: To provide a milk component-containing coffee beverage or tea beverage excellent in quality maintenance and stability by significantly suppressing generation of upper transparency, deposition, ring and the like during sterilization treatment and long-term storage even when a salt as a pH adjustment agent is not practically used during manufacturing, and further to provide the milk component-containing coffee beverage or tea beverage having good aroma generation and rich flavor while having high stability.SOLUTION: Carrageenan having a μ component and a ν component is used as a stabilizer for a coffee beverage or a tea beverage capable of remarkably suppressing generation of upper transparency, deposition, ring and the like during sterilization treatment and long-term storage even when a salt as pH adjustment agent is not practically used during manufacturing.COPYRIGHT: (C)2014,JPO&INPIT【課題】製造時にpH調整剤としての塩を実質的に使用しない場合であっても、殺菌処理及び長期保存下における上透き、沈殿及びリング等の発生が有意に抑制され、品質保持及び安定性に優れるコーヒー飲料、紅茶飲料を提供する。更には、高い安定性を有しつつも香り立ちが良好で風味豊かな、乳成分含有コーヒー飲料又は紅茶飲料を提供する。【解決手段】製造時にpH調整剤としての塩を実質的に使用しない場合であっても殺菌処理及び長期保存下における上透き、沈殿及びリング等の発生を有意に抑制できるコーヒー飲料又は紅茶飲料用安定剤として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