Using a car driving simulator, we can observe drivers' behaviors in dangerous situations safely. We constructed an immersive car driving simulator. We conducted an experiment in a real environment and an experiment in this virtual environment. The task was that a driver turned a car to the right in both real and virtual environment. The numbers of subjects were one in a real environment and six in a virtual environment. We observed a common behavior of a driver in both environment, two common behaviors of six drivers in virtual environment and two individual variations from six drivers in virtual environment. Our immersive car simulator worked as a simulation of a real driving situation.