Giorgio Walter Canonica (Born October 25, 1947) is an Italian medical scientist and professor at Allergy and Respiratory Diseases, Dept. of Internal Medicine, Humanitas University, Milano. He is known for his research work related to innovative treatment strategies for allergic diseases which includes biological response modifier in form of targeted immunotherapy with primary emphasis on sublingual immunotherapy (SLIT). He has served as Secretary General and President elect of World Allergy Organisation for six consecutive years and has served as president of the same organization during 2007–09. He is also the vice-president of INTERASMA.