A vehicle driving control system has an automatic driving mode for automatic driving. The system includes a driver monitor, a driver abnormal state detector, a risk state detector, and an alarm controller. The driver monitor monitors, as a driver, an occupant in a vehicle compartment that can take over driving from the system during the automatic driving mode. The driver abnormal state detector detects an abnormal state of the driver based on a monitoring result by the driver monitor. The risk state detector detects, as a risk state, at least one of a control state or a traveling environment of the vehicle in the automatic driving mode. The alarm controller controls an alarm to be output to the driver during traveling in the automatic driving mode based on at least the risk state out of the abnormal state of the driver and the risk state of the automatic driving mode.