An airflow adjusting apparatus to be provided in a vehicle includes a flap and an airflow generator. The vehicle includes a wheel disposed to be partly protruded downward from a vehicle body of the vehicle. The flap is protruded, in front of the wheel, downward from the vehicle body. The airflow generator is provided in an underneath of the vehicle body and vehicle-widthwise inwardly from the wheel. The airflow generator is configured to generate an airflow vehicle-widthwise inward, and backward of the vehicle. The airflow moves obliquely relative to a vehicle longitudinal direction when the vehicle travels forward.