A blood fluidity-improving agent, a blood circulation promoter or a cerebrovascular disease-improving agent, containing as an active ingredient thereof one or more ingredients selected from the group consisting of chlorogenic acids, caffeic acids, ferulic acids and pharmaceutically acceptable salts of these acids. The present blood fluidity-improving agent, blood circulation promoter or cerebrovascular disease-improving agent is highly safe and can be orally taken over longer periods of time.
