Syoziro Asahina (朝比奈 正二郎, Asahina Shōjirō, June 10, 1913, Bunkyō, Tokyo – November 28, 2010) was a Japanese entomologist, specializing in dragonflies and damselflies.
Asahina's father was a professor of pharmacology at Tokyo Imperial University.
Asahina began studying Odonata as a senior school student, and took part in collecting trips to Hokkaido and southern Sakhalin with his father.
He spent much of his career as Chief of the Department of Medical Entomology at the Japanese National Institute of Health, from which he retired in 1979.
He was president of the Entomological Society of Japan from 1971–1972 and president of the Japanese Society of Systematic Zoology from 1982–1983.