A 26-year-old woman in the 28th week of pregnancy presented with a primary cerebral hydatid cyst manifesting as deteriorating consciousness and weakness in the left arm and leg. Cranial computed tomography revealed an intracranial hydatid cyst. The cyst was surgically removed and albendazole was administered. The patient had a spontaneous vaginal term delivery and no problem was observed in the mother or child. No primary focus was found in the lungs, liver, and other organs. Hydatid cyst is still an important disease. Intracranial hydatid cyst without primary foci in organs such as the liver and lungs is very rare. Primary cerebral hydatid cyst during pregnancy can be successfully treated by surgical and medical intervention.