Abstract: This paper deals with the driver factor in the traffic accidents.From the wiew of the psychology, we consider the driver as an information processor and discuss the driver's primary information processing functions and the process. In describing the specific human factor in accident a distinction was made between human direct causes and indirect causes whose presence caused the direct causes. The traffic safety can be improved by applying the principles of the psychology in driver education, licensing, enforcement of traffic laws and remedial caurses.