1. The efficiency of honey-bee in the pollination of Japanese persimmons was studied at Okitsu, Tokai Branch of Agricultural Horticultural Experiment Station in 1949 and 1950.
2. The female flowers situated in the near of male flowers were better pollinated than those situated distant from male flowers.
3. Most of honey-bees visited to the male flowers of Zenjimaru had pollen pellets on their legs.
4. Most of honey-bees visited to the female flowers of Fuyu had not pollen grains.
5. The roles of honey-bees in the pollination of Japanese persimmons were discussed.