A structural member for a vehicle projects from a vehicle body. The structural member includes a first airflow surface and a second airflow surface along each of which airflow flows, and an imaging window. The first airflow surface and the second airflow extend between a front edge and a rear edge of the structural member in a front-rear direction of the vehicle body and face away from each other. The first airflow surface has a length longer than a length of the second airflow surface in the front-rear direction. The imaging window is provided in the first airflow surface, and an image of an area outside the vehicle body is captured through the imaging window.