Aerodynamic structure for vehicle

An aerodynamic structure for a vehicle, comprising:

• an airflow collision wall provided at a front or a rear in a vehicle body longitudinal direction with respect to a wheel in a wheel house, the airflow collision wall extending in a vehicle width direction and facing downward in a vehicle body vertical direction;
• an airflow guiding wall extending downward in the vehicle body vertical direction from an end portion of the airflow collision wall, wherein the airflow collision wall has a first side and a second side, the first side being farther than the second side away from the wheel in the vehicle body longitudinal direction, and wherein the end portion is at the first side of the airflow collision wall;
• and
• a cross-sectional shape sudden change portion formed in the vehicle width direction at a portion of at least one of the airflow collision wall and the airflow guiding wall, and including a part that extends along a direction intersecting the vehicle width direction.