Somatic embryogenic cells of Siberian ginseng (Eleutherococcus senticosus or Acanthopanax senticosus)were cultured in MS liquid medium by subculture at 2 week intervals. The embryogenic cellswere filtered through a 250 mm sieve and the passed cells could proliferate with maintenance ofsomatic embryos. The embryogenic cell clusters entrapped on the sieve were transferred to an MSmedium without growth regulators and were cultured under fluorescent light in the half shade.The cell clumps developed to somatic embryos of uniform sizes of torpedo stage after 4~5 weeksof culture. The somatic embryos in a torpedo stage were found to gain in fresh weight about 20times greater after culturing in the bio-reactors. The somatic embryos in a torpedo stage weretransferred to 510 L air-left type bioreactors. The culturing for 10~15 days led the somaticembryos to the development of seedlings which could be utilized as materials for health foods orproviding useful components.