The car has an important impact on the elderly activities of daily living and social participation. However, the physical depression by aging has also the cause of the car accident. In this report, we research about the physical and environmental factors of a car dependency based on a survey. To identify influencing factors, a survey on the attitudes of over 60 years of age people was adopted in a study on 767 elderly. The investigation revealed that the aging and physical diseases were significantly related to driving abilities. In addition respondents living in an aging area have a strong need for a car driving, anxious about the risk of leaving a car and need an encourage improvement of mass transport system.