Stroke is a high-risk disease. The future of the medical environment is that the proportion of elderly population is increasing, the average life expectancy is being increased, while the fatal rate of stroke will be low. These situation will due to the financial burden on medical insurance. The most important factor that affects on the medical costs of stroke patients is the length of stay. In this study the mean length of hospital for stroke stay was 21.81days(37.97days for intracerebral hemorrhage, 18.89 days for cerebral infarction). The payment per case of stroke was 6.86 million won(12.6 million won for intracerebral hemorrhage, 5.72 million won for cerebral infarction). The payment per case of intracerebral hemorrhage was 2.2 times more than that of cerebral infarction. The payment in the day of hospitalization was the highest and until the second day medical costs was high. After the third day medical costs tended to decline, after that seemed to show an almost constant level. The length of hospital stay was found to be the most important determinant of inpatient charges for stroke. Accordingly rational management of the length of stay will be beneficial to health care consumers, providers, states.