An engine non-stop warning apparatus for a vehicle provided with an engine stop control section configured to stop an engine on condition that a stop switch is continuously pressed for a specified time duration during operation of the engine includes an engine stop determination section configured to determine whether or not the engine is going to stop or stopping by the lapse of the specified time duration after the stop switch is pressed during the operation of the engine, and an engine non-stop warning section configured to warn a vehicle user that the engine is not stopping in a case the engine stop determination section determines that the engine is not going to stop or stopping by the lapse of the specified time duration after the stop switch is pressed during the operation of the engine.