Vitamin D is a prohormone which dissolves in the oil, and can be produced in the body with adequate sunlight exposure or consumed in food or supplements. Today Vitamin D deficiency may be observed as pandemic. The reason of this deficiency is the lack of sun exposure. Vitamin D intoxication causes hypercalcemia independent of parathyroid hormone. In this paper we presented a case of vitamin D intoxication patient who admitted to our clinic with severe hypercalcemia.