Allergic reactions developed in parturients can cause fetal asphyxia and some difficulties in anesthetic management. We performed general anesthesia for an emergent cesarean section on 30 yrs old woman who showed an allergic reaction to an antibiotic. Dyspnea, urticaria, sweating, generalized edema and fetal bradycardia suddenly occurred after an intravenous injection of the antibiotic. Dexamethasone 10 mg was administered intravenously. General anesthesia was induced with pentothal and succinylcholine. Despite of severe airway edema, endotracheal intubation was successful. During the operation, the allergic signs became decreased. After the operation, no additional problems were evident. Potential epitopes should be removed in susceptible parturients and medical staff should be familiar with anesthetic management in allergic patients during pregnancy.