To present an unexpected accident by a wrong start surely further with a cost reduced in an AT mounting vehicle during stopping by only a parking brake left as in a running position during rotation of an engine.

In an AT mounting vehicle, a control unit 9 is equipped such that while an engine is in rotation, an AT position is set to a position except a parking or neutral position, and when the vehicle is placed in a condition during stopping by only a parking brake, in the case of detecting moving of the vehicle, a contact of a power cutoff relay 7 is opened, the engine is stopped.