Disclosed is a driving support device that is capable of realizing driving support in consideration of a risk potential determination tendency of a driver. The driving support device is a device that estimates a risk potential that is a degree of a risk with respect to a risk target in driving of a vehicle and performs a driving support for a driver of the vehicle on the basis of the estimated risk potential, and includes: a risk potential bias setting unit that sets a risk potential bias that is a value for changing the risk potential on the basis of a risk potential determination tendency of the driver; and a risk potential estimating unit that changes the risk potential on the basis of the risk potential bias set by the risk potential bias setting unit.