This paper reports the case ofa 53-year-old woman with hypocalcemia-induced reversible cadiomyopathy. Laboratory tests showed hypocalceniia caused by idiopathic hypoparathyroidism. Her left ventricular dysfunction persisted for a long period even after normalization of the serum calcium level. Observations suggest that physicians should be aware that hypocalcemia can be a reversible cause of cardiomyopathy and congestive heart failure.