Increased and inappropriate production of aldosterone from the adrenal gland is known as primary aldosteronism and leads to sodium retention with hypertension, suppression of plasma renin, and hypokalemia and its manifestations. It is due mainly to a solitary adenoma, bilateral hyperplasia, or rarely an adrenal carcinoms. Primary aldosteronism due to an adenoma is usually treated by surgical excision. Preoper-ative managements include the correction of hypokalemia, volume derangement, and metabolic alkalosis with spironolactone and the trestment of existing hypertension. The authors report a case of unilateral adrenalectomy and anesthetic considerations during perioperative periods.