Postpartum eclampsia is one of the serious complication during the puerperium although it is not common. We have encountered 13 cases of postpartum eclampsia which occured smong a total of 6040 deliveries in Ewha Womans University Hosptial, Seoul during the period from 1964 to 1966, the incidence being one case per 500 deliveries, Postpartum eclampsia constitues approximately 2.8% of all cases of Toxemia or 31% of all cases of eclampsia. Over all the incidencies were considered very high. 1. The majority cases (92%) of Postpartum eclampsia were occurred in the multiparas, and that never had prenatal cares (91%). Approximately 2/3 cases of Postpartum eclampsia have occurred after home delivery without modern obstetrical care (poor socio-economic group). 2. It is emphasized that careful Pstpartum care during first 5-10 days of puerperium shoud not be neglected to prevent or minimize these or other postpartum complications. 3. October is the peak month for Postpartum eclampsia in Seoul. This was similar to that of occurred in Miami area, although it is uncertain that whether or not it could be corelated with the mean temperature or the mean relative humidity. 4. The severity of Postpartum eclampsia depended on the degree of elevation of uric acid, and also the delayed occurrence appeared to be more severe with increased convulsion. 5. A careful study of family history seemed very important even in the puerperium since perfectely normotensive mother having family history of hypertension particularly on the parents side appeared to be a good candidates for the sudden onset of post partum eclampsia. 6. The mean weight of newborn baby from the mother of postpartum eclampsia was decreased approximately 650-850 Gm as compared with normaly expectant newborn weight, however there was no fetal death.