PROBLEM TO BE SOLVED: To provide a cancer cell proliferation inhibiting agent and a health food.SOLUTION: This invention relates to: a cancer cell proliferation inhibiting agent containing water-soluble nucleic acid with a molecular weight of 1,000-3,000 obtained by applying enzyme treatment to salmon milt, or the water-soluble nucleic acid and amino acid and a cancer cell proliferation inhibiting agent and a health food which contain the same.COPYRIGHT: (C)2014,JPO&INPIT【課題】癌細胞増殖抑制剤並びに健康食品を提供する。【解決手段】鮭白子を酵素処理することにより得られる分子量1000乃至3000の水溶性核酸、又は該水溶性核酸及びアミノ酸を含有することを特徴とする癌細胞増殖抑制物質及びこれを含む癌細胞増殖抑制剤並びに健康食品に関する。【選択図】なし