PURPOSE: This study was designed to analyze the results of echocardiographic findings in children with heart murmur detected at mass health screening in Kyeong-Nam province. METHODS: Between 1996 and 2001, children with heart murmur underwent the echocardiographic examination at Gyoeongsang National University Hospital. RESULTS: The number of children examined was 129 in 1996, 26 in 1997, 44 in 1998, 61 in 1999, 60 in 2000, and 49 in 2001. By the echocardiographic examination, innocent murmur was the most commonly diagnosed(31-65%) and ventricular septal defect(VSD) was the most common cardiac defect. Between 1996 and 1998, complex cyanotic heart diseases were more frequent. The number of patients undergoing surgical treatment was 9 in 1996, 10 in 1997, 7 in 1998, 5 in 1999, 2 in 2000, and 2 in 2001. CONCLUSION: By the echocardiographic examination, functional murmur was the most commonly diagnosed and VSD was the most common cardiac defect. Currently, heart defects detected tend to be more simple and the surgical treatment needed seems to decrease in number.