Virological investigations of bats performed in the territory of Republic of Guinea permitted for the first time to isolate from the bats Micropteropus pusillus and Hipposideros abae two strains which were identified as R. V. F. V. Serological investigation revealed specific antibodies to R. V. F. V. among natives in 3.3% and among domestic animals in 6.8%. It is supposed that bats are reservoir of this virus. They can transmit agent of R. V. F. by means of mosquitoes or by being part of the native diet.