The International Motor Show Germany or simply International Motor Show, in German known as the Internationale Automobil-Ausstellung (IAA - International Automobile Exhibition), is the world's largest motor show. It is held annually, with passenger vehicles (including some motorcycles) being displayed in odd-numbered years in Frankfurt am Main, and commercial vehicles in even-numbered years in Hanover, Germany. Before 1991 the show was held solely in Frankfurt.

The IAA is organized by the Verband der Automobilindustrie (VDA – Association of the German Automotive Industry) and is scheduled by the Organisation Internationale des Constructeurs d'Automobiles. Currently, the show in Frankfurt occupies twelve buildings.