A short biography of 1. Matsui (born Apr. I, 1921, Nagoya, Japan; deceased Dec. 17, 1987, same place; amateur odonatologist, staff member of a construction company) and a brief evaluation of his odonatological work are followed by his odonatological bibliography (1951-1988). A portrait is also provided. On December 17, 1987, Ichiro Matsui passed away suddenly at the age of 66, at a hospital near his home in Nagoya City. He had been one of the leading odonatologists in Japan, and his death is much deplored.