Abstract: An aerodynamic device for a vehicle that can effectively adjust airflow within a wheel house is obtained. A fixed aerodynamic stabilizer device 10 is formed at a vehicle body longitudinal direction rear side of a rotational axis of a front wheel 15 within a wheel house 16, as a step having an airflow collision groove wall that faces downward in a vehicle body vertical direction. This fixed aerodynamic stabilizer device 10 suppresses flowing-in, into the wheel house 16, of airflow F that is generated accompanying the front wheel 15 rotating in a direction of arrow R.

Abstract: A vehicle undercover is provided with a fixed section fixed to a front body and a rotating section, one end of which is rotatably coupled to the fixed section and the other end of which vertically moves relative to the front body so as to be able to open and close a lower opening, in which the fixed section closes a part of the lower opening and the rotating section closes a remaining part of the lower opening, which is not closed by the fixed section. Such a configuration improves aerodynamic performance of a vehicle and improves workability of maintenance operation.

Abstract: An aerodynamic device for a vehicle that can effectively adjust airflow within a wheel house is obtained. A fixed aerodynamic stabilizer device 10 is formed at a vehicle body longitudinal direction rear side of a rotational axis of a front wheel 15 within a wheel house 16, as a step having an airflow collision groove wall that faces downward in a vehicle body vertical direction. This fixed aerodynamic stabilizer device 10 suppresses flowing-in, into the wheel house 16, of airflow F that is generated accompanying the front wheel 15 rotating in a direction of arrow R.