Impetigo herpetiformis is a rare disease, which traditionally has been classified among the unique dermatoses of pregnancy. It is associated· with severe maternal and fetal complications in case of misdiagnosis and delayed treatment. Diagnosis is based on the overall clinical, laboratory, and histological features. Promt and aggressive treatment is needed, and termination was effective in severe case. This pregnant woman was 32-years-old multigravida with transverse lie of fetus. At 24 weeks gestation, she developed erythematous scaly annular patchs with papules and pustules on inner thigh. The skin lesion was aggravated at 31 gestational weeks. The skin of the affected area was biopsied and the result was consisitent with impetigo herpetiformis. Treatment commenced with intravenous fluids, intravenous dexamethasone under the careful fetal well being monitoring. Cesarean section was done due to transverse lie of fetus, and a normal healthy baby was delivered, following which the patient condition improved rapidly. At one month after the delivery, the skin lesions of the patient was fully recovered.