An engine control unit includes an anomaly judging section for judging whether or not there is any anomaly in throttle sensors based on the output of the throttle sensors, a throttle motor driving section for controlling the driving of a throttle motor, and a fuel injection control section for controlling the amount of fuel injection at the time of starting an engine by using the fuel injection map for starting. The throttle motor driving section stops the driving of the throttle motor if the throttle sensors are judged to be anomalous, and the fuel injection control section switches the fuel injection map for starting in a normal state into the fuel injection map for starting in an anomalous state at the time of restarting the engine after stopping the engine in a state wherein the throttle sensors are judged to be anomalous.