An ECU 30 executes ignition timing retarding control for retarding ignition timing in relation to idling ignition timing at the start of an engine. Also, during the execution of the ignition timing retarding control, on condition that an engine speed NE becomes less than or equal to an idling target speed NEidle and the difference ΔNE of these values becomes greater than or equal to a predetermined value ΔNEstpx, the ECU 30 stops the ignition timing retarding control and executes an ignition timing advancing control for advancing the ignition timing. When a coolant temperature THW is higher than or equal to a predetermined temperature THW1, the ECU 30 stops fuel injection on condition that the engine speed NE becomes greater than or equal to a predetermined speed NEcut. Further, if the coolant temperature THW is higher than or equal to the predetermined temperature THW1, the ECU 30 sets the predetermined value ΔNEstpx for stopping the ignition timing retarding control to a larger value than in a case where the engine temperature THW is lower than the predetermined temperature THW1.