PROBLEM TO BE SOLVED: To provide a method for making hydrogen-containing ice capable of keeping the effect of active hydrogen for a long period of time because dissolvability of the active hydrogen is excellent, and a method for keeping freshness of fishery products by using the hydrogen-containing ice.SOLUTION: A method for keeping freshness of fishery products is characterized by cooling them with hydrogen-containing ice containing 200 ppb or more of active hydrogen.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】活性水素の溶存性が優れることで活性水素の効果が長く継続できる水素含有氷の製造方法及び、この水素含有氷を用いた魚介類の鮮度保持方法の提供を目的とする。【解決手段】魚介類の鮮度を保持する方法であって、活性水素を200ppb以上含有する水素含有氷にて冷却することを特徴とする。【選択図】 なし