The purpose of this study was to examine the influence of traffic accident(TA) risk factors. The medical institution checks the medical records of the traffic accident to determine in particular factors of factors such as human, physical and environmental factors. It's meant to help provide appropriate emergency treatment in case of TA to lower injury severity. For this purpose, 1649 cases of TA patients were collected. These patients were hospitalized in three different medical institutions in the metropolitan area have been hospitalized for the past year. The collected data were analyzed by a statistical package SPSS 20.0. The result of the study showed that the average age was 41.7(±18.94) years old, and the ratio of male to female was 6:4. A means of traffic accidents by which they causative agent was identified as the major factor that affected the injury severity of TA, and age, hospital-visit means, hospital-visit passage of injury were also influential factors. Based on the results, In order to prevent a hurt from a TA, preventive education tailored to different age groups are required, and emergency treatment and swift transfer are quite important to lower injury severity.