A drive assist device (1) is equipped with: a driver-status detection unit (30) for outputting a control-start signal; a consent-confirmation unit (41) for, upon receiving the control-start signal from the driver-status detection unit (30), asking the driver whether it is possible to execute an emergency-evacuation control for stopping the vehicle at a safe location without the driver performing a driving operation, and receiving the response to the inquiry from the driver; a control unit (44) for executing the emergency-evacuation control when the consent-confirmation unit (41) receives a response from the driver permitting execution of the emergency-evacuation control; and an erroneous-operation determination unit (42) for determining whether or not the driving operation by the driver is an erroneous operation. Furthermore, the control unit (44) limits the driving operation by the driver when the erroneous-operation determination unit (42) determines that the driving operation by the driver is an erroneous operation, during the interval from receipt by the driver-status detection unit (30) of the control start signal until receipt by the consent-confirmation unit (41) of the response permitting execution of the control.