Idiopathic hypoparathyroidism is frequently associated with intracranial calcification and neuropsychiatric abnormalities. The most commonly recognized central nervous system manifestations of chronic hypoparathyroidism are seizure, alteration of mental function and extrapyramidal signs. We present a case of hypoparathyroidism, demonstrating extensive intracranial calcification, not only basal ganglia, but also outside the extrapyramidal system. An 58-year-old woman presented with 30 year history of seizure and memory disturbance. The physical examination and several laboratory studies disclosed normal. However hypocalcemia, hyperphosphatemia with hypocalciuria and decreased parathormone level were demonstrated. Clinical symptoms and signs showed improvement after supplementary calcium and Vit $D_3$ therapy.