Hyperparathyroidism caused by parathyroid adenoma is one of causes of hypercalcemia. Majority of parathyroid adenoma cases are found incidentally. We report a male patient aged 40 years, asymptomatic, who is undergoing routine laboratory examinations to extend his work contract. On examination we found an increase in calcium levels and parathyroid hormone levels. Then MSCT examination showed bilateral parathyroid adenoma. The diagnosis pathway and proper treatment for parathyroid adenoma can be challenging and problematic owing to inability of standard imaging to detect small enlargement of parathyroid glands. MSCT has the advantage of being able to detect small parathyroid lesions that cannot be detected by simple imaging modalities. Parathyroidectomy is the definitive treatment for adenoma parathyroid. Keywords: Hypercalcemia, parathyroid, asymptomatic.