PROBLEM TO BE SOLVED: To provide a driving support device for urging a driver to shift from a state where drivers concentration (drivers tension) is so high that he or she is less calm to a state where a degree of drivers concentration and a degree of drivers calmness are respectively moderate, and/or shift from a state where drivers concentration (drivers tension) is so low that he or she is too calm to a state where a degree of drivers concentration and a degree of drivers calmness are respectively moderate.SOLUTION: The driving support device comprises: a driver state determination device for determining a state of a driver a travel environment determination device for determining a travel environment a support content determination part for determining driving support content on the basis of the driver state determined by the driver state determination device and the travel environment determined by the travel environment determination device and a support main body part for providing the driving support content determined by the support content determination part to the driver.SELECTED DRAWING: Figure 4
