A warning device includes: a driver biological information acquisition unit acquiring driver's biological information; an estimation unit estimating a driver's arousal level based on the biological information; a vehicle behavior information acquisition unit acquiring vehicle's behavior information; and a warning unit issuing a warning based on arousal level information indicating the arousal level and the behavior information. The vehicle behavior information acquisition unit generates driving support warning information for causing a driving support warning to occur based on the behavior information. The warning device analyzes a driving tendency of the driver based on the arousal level information and the driving support warning information to acquire analysis information. The warning unit issues a warning corresponding to the driving tendency based on the analysis information.
WARNING DEVICE AND DRIVING TENDENCY ANALYSIS METHOD