An output control device configured to control the output of a running drive source mounted on a vehicle includes an anomaly discriminator which judges that the output control device is anomalous, if excess acceleration G (output difference index) of the vehicle remains greater than or equal to a predetermined threshold value G1, . . . , G7 for a predetermined time t1, . . . , t7 or longer, wherein the predetermined time t1, . . . , t7 for the anomaly discrimination is set so as to shorten with increase in the threshold value G1, . . . , G7 of the excess acceleration of the vehicle.