<p>A roof apparatus for a vehicle includes first and second projecting members (2) each mounted on a roof (11) of the vehicle (1) and each including an elongated shape. The first and second projecting members are arranged at first and second end portions (11c) of the vehicle in a width direction of the vehicle. A height of each of the first and second projecting members (2) is equal to or greater than a height of an upper end of a boundary layer of an airflow (P1) flowing on the roof (11).
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