We present two cases of measles encephalitis, one in early pregnancy and one after delivery. In case 1, the patient became unconscious 6 days after the appearance of a rash and was treated with glycerol and immunoglobulin. In case 2, the patient became unconscious 6 days after the appearance of a rash and was also treated with glycerol and immunoglobulin. Both of them recovered without any neurological sequelae. Pregnancy is a risk factor for severe measles complications, and vaccination should be promoted much more in countries with poor measles control, such as Japan.