The International Motor Show or Internationale Automobil-Ausstellung (IAA) is the world's largest motor show. It is held biennially in Frankfurt, Germany and is known in English as the Frankfurt Motor Show.

The IAA is organized by the Association of the German Automotive Industry (VDA). Since 1992 the show is split in two: Even-numbered years show commercial cars in Hannover and odd-numbered years passenger vehicles (including some motorcycles) in Frankfurt. The show is scheduled by the Organisation Internationale des Constructeurs d'Automobiles, which considers it a major international auto show.