Bombus terrestris was released for pollination of apple flowers at apple orchards in Uileumgol, Milyang-sity, mid spring, 2008. Numbers of out-going bees and in-coming bees were 38heads at 10 a.m. and 23heads at 4 p.m., respectively. 75% bees per total in-coming bees collected the pollens about 10 a.m. and 63% bees per total in-coming bees collected the pollens around 4 p.m.. The SEM photography(A) showed that 82.7% of a pollen load were collected on apple flowers and 17.3% of a pollen load were collected from another plants and trees flowers. The another SEM photography(B) showed that 89.1% of a pollen load were collected on apple flowers and 10.9% of a pollen load were collected from another plants and trees flowers. Therefore these results show that B. terrestris mainly pollinates on the apple flowers but the bee seems to visit flowers of other plant species from time to time.