Maternal and fetal effects of anesthesis for 781 cases ceasarean sections, performed during the past 10 years (1965~1974) in Hanil Hospital have been evaluated clinically. It is emphasized that the selection of anesthetic agents and methods, should depend upon the physical status of the patients and the ability of both obstetricians and anesthesiologists. Optimal results require effective teamwork amongst obstetricians, anesthesiologists and nursing personnel. The anesthesiologist should be fully infermed of obstetric aspects. A variety of anesthetic techniques can be used for elective and emergency Caesarean sections. Each technique has its own advantages, disadvantages and limitations which must be thoroughly understood for proper application. The choice of anesthesia should be determined primarily by the experience of the operator, the degree of ugency, condition of the monther and the fetus, the physiopathology, the skill of the obstetrician and the desires and the emotional state of the monther.