Abstract: In a driving assist device for a vehicle, there are provided a specified-operation detecting device to detect that a specified operation is conducted by a driver at a normal driving state, a normal-driving-state stimulation proving device to provide the driver with a specified stimulation associated with the specified operation when conduction of the specified operation by the driver is detected, a collision-likelihood determining device to determine a likelihood of collision of the vehicle against an obstacle, a collision-avoidance operation determining device to determine a necessary operation to be conducted by the driver for avoidance of collision when the likelihood of collision of the vehicle against the obstacle is determined, and a collision-avoidance-state stimulation proving device to provide the driver with a stimulation associated with the necessary operation for collision avoidance so that the driver can be encouraged to conduct the necessary operation for collision avoidance.