In temporary immersion system (TIS), plant materials are exposed to the medium for a short time, therefore they are more exposed to the air and a lack of oxygen frequently experienced by a liquid culture can be avoided. This experiment was conducted to determine the procedure for callus proliferation up to somatic embryo germination of oil palm (Elaeis guineensis Jacq.) in TIS culture. Embryogenic calli of oil palm clone MK 638 from Marihat Research Institute were cultured on solid medium in the dark culture room and then used as materials for TIS. Immersion time for all cultures was three minutes every six hours. Callus proliferation was conducted in DF liquid culture with 5 mg/L 2,4-D and 0.1 mg/L kinetin with transfer interval of 4, 6 and 8 weeks. The treatments for somatic embryo maturation were kinetin and ABA, whereas for somatic embryo germination was IBA, kinetin and GA3. The results show that the best transfer interval for callus proli- feration was four weeks. In this treatment the relative growth rate of callus was 0.38 g/g/week. Somatic embryo initiation from the callus was done in DF medium supplemented with 1 mg/L 2,4-D and 0.1 mg/L kinetin. The percentage of somatic embryo was 80% based on biomass fresh weight after the fourth subculture. The addition of 0.5 mg/L kinetin and 0.05 mg/L ABA improved somatic embryo maturation of oil palm; the average