The author points out that Dr. Hideyo Noguchi, who was a professor of the Rockefeller Foundation, New York, and died in Africa of the yellow fever he was investigating, had contact while living in Tokyo, with the people who established the Japan Medical Library. And the possibility that Dr. Noguchi used the Japan Medical Library, which was established in 1898, is also pointed out. Other points such as Dr. Noguchi's life in Tokyo and geographical conditions concerning the possibility of his use of the library are considered.