PROBLEM TO BE SOLVED: To provide a cooked frozen food which can maintain its quality including such as texture, even after naturally thawed, and a quality improver for cooked frozen food that is for use in the frozen food.SOLUTION: A quality improver for cooked frozen food comprises (a) alginic acid sodium, (b) mono glycerol fatty acid ester and (c) starch.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】自然解凍した後も食感等の品質を維持することができる加熱調理済冷凍食品及び該冷凍食品に用いる加熱調理済冷凍食品用品質改良剤を提供すること【解決手段】(a)アルギン酸ナトリウム、(b)モノグリセリン脂肪酸エステル及び(c)澱粉を含有することを特徴とする加熱調理済冷凍食品用品質改良剤。【選択図】 なし