The 1st Motor Brigade was a formation of the Australian Army during World War II. The brigade was converted in April 1942, from the 1st Cavalry Brigade. The brigade was assigned to the 5th Division on formation, then transferred to the 1st Motor Division in September 1942, and transferred again in November 1942, to the 3rd Armoured Division. The brigade was disbanded in July 1943, and did not see any active service.