PROBLEM TO BE SOLVED: To provide a composition containing an ACE inhibitor peptide which inhibits ACE effectively through intake of a small amount, has no possibility of side effects and allows hypertensive persons to ingest easily in daily life.SOLUTION: A composition containing an ACE inhibitor peptide contains a tripeptide Asp-Arg-Pro which is prepared by hydrolyzing a protein source with a solid koji culture and has an angiotensin-converting enzyme inhibiting activity in concentration of 47-154 μg/ml. Alternatively, a composition containing an ACE inhibitor peptide contains a tripeptide Gly-Val-Pro which is prepared by hydrolyzing a protein source with a solid koji culture in a concentration of 21-56 μg/ml.COPYRIGHT: (C)2014,JPO&INPIT【課題】少量の摂取でACEを有効に阻害し、かつ副作用の心配が無く、高血圧者が日常生活の中で容易に経口摂取できるACE阻害ペプチドを含む組成物を提供すること。【解決手段】タンパク質源を固体麹培養物によって加水分解し、アンジオテンシン変換酵素阻害活性を有するトリペプチドAsp-Arg-Proが47~154μg/mlの濃度範囲で組成物中に含有させるようにする。または、タンパク質源を固体麹培養物によって加水分解し、アンジオテンシン変換酵素阻害活性を有するトリペプチドGly-Val-Proが21~56μg/mlの濃度範囲で組成物中に含有させるようにする。【選択図】図1