The purpose of this study is to identify and clarify the factors which affect the complaining type, the complaining behavior, and the subsequent purchase intention. The data in this study is collected through questionnaires from patients with grievances who visited the help desk centers of :1 general hospitals in Seoul. Total 70 questionnaires were collected. The conclusions from this study can be summarized as follows; 1. The complaining type(related with medical service) have relatively correlation with the having of occupation among demographic characteristics and select motivation of hospital. 2. The complaining type(related with medical service) has an effect un the official complaining behavior. And the older persons take action with the official complaining behavior. 3. The complaining type(related with medical service) has an effect on the negative purchase intention. Therefore the most important thing in hospitals management is that hospitals improve their medical service quality. And hospital managers should station the complaining center and try to ease the complaining behavior and negative purchase intention.