A control system for an autonomous driving vehicle, comprising: an operation device configured to be operated by a driver; a notification device configured to give notification to the driver; and an electronic control unit comprising: a driving control part configured to perform autonomous driving, and to terminate autonomous driving and switch vehicle driving to manual driving when the driver operates the operation device during autonomous driving; and a notification control part configured to control the notification device to first notify a request for preparing for manual driving to the driver and then notify a request for terminating autonomous driving to the driver when the driver should be requested to terminate autonomous driving during autonomous driving, wherein the request for preparing for manual driving requests the driver to establish conditions for preparing for manual driving while continuing autonomous driving, wherein the request for terminating autonomous driving requests the driver to operate the operation device to terminate the autonomous driving; the system being characterized in that it further comprises a deactivating device configured to be operated by the driver, wherein the notification control part is configured to control the notification device to notify the request for terminating autonomous driving to the driver without notifying the request for preparing for manual driving to the driver if the driver should be requested to terminate autonomous driving during autonomous driving after the driver operates the deactivating device. an operation device configured to be operated by a driver; a notification device configured to give notification to the driver; and an electronic control unit comprising: a driving control part configured to perform autonomous driving, and to terminate autonomous driving and switch vehicle driving to manual driving when the driver operates the operation device during autonomous driving; and a notification control part configured to control the notification device to first notify a request for preparing for manual driving to the driver and then notify a request for terminating autonomous driving to the driver when the driver should be requested to terminate autonomous driving during autonomous driving, wherein the request for preparing for manual driving requests the driver to establish conditions for preparing for manual driving while continuing autonomous driving, wherein the request for terminating autonomous driving requests the driver to operate the operation device to terminate the autonomous driving; the system being characterized in that it further comprises a deactivating device configured to be operated by the driver, wherein the notification control part is configured to control the notification device to notify the request for terminating autonomous driving to the driver without notifying the request for preparing for manual driving to the driver if the driver should be requested to terminate autonomous driving during autonomous driving after the driver operates the deactivating device. a driving control part configured to perform autonomous driving, and to terminate autonomous driving and switch vehicle driving to manual driving when the driver operates the operation device during autonomous driving; and a notification control part configured to control the notification device to first notify a request for preparing for manual driving to the driver and then notify a request for terminating autonomous driving to the driver when the driver should be requested to terminate autonomous driving during autonomous driving, wherein the request for preparing for manual driving requests the driver to establish conditions for preparing for manual driving while continuing autonomous driving, wherein the request for terminating autonomous driving requests the driver to operate the operation device to terminate the autonomous driving; the system being characterized in that it further comprises a deactivating device configured to be operated by the driver, wherein the notification control part is configured to control the notification device to notify the request for terminating autonomous driving to the driver without notifying the request for preparing for manual driving to the driver if the driver should be requested to terminate autonomous driving during autonomous driving after the driver operates the deactivating device.