To provide an engine control device including a transient-state determination-processing unit 24a that determines whether an operating state of an engine is in a transient state of shifting to an acceleration state based on a change amount of a target throttle opening degree, and a transient-state correction-processing unit 24b that retards an ignition timing by a predetermined amount set by the change amount when the transient-state determination-processing unit determines that the operating state of the engine is in the transient state.