Born at Clichy ( Seine) July 26, 1899. Secondary studies at the Collège Rollin. Prepares for the Ecole Centrale. In 1921 he gives up science and enrolls at the Académie Billoul, where he meets Eugène Dabit. From 1929 to 1932 he travels around the world, stopping in Indo-China, Bali, Bora-Bora, Martinique. In 1923 he meets Loutreuil with whom he works for several years. From 1926 to 1928 he is in charge of an art gallery and spends the winters in Morocco. On his return he exhibits at the Galerie du Portique, and since 1933 at the Galerie Bernier. In 1934 he is awarded the Blumenthal Prize and later discovers Spain. In 1936 he is awarded the Prix de l'Afrique du Nord. Spends the winters once again in Morocco from 1936 to 1939. He is taken prisoner in June 1940, and is liberated after a year of captivity. Caillard has decorated notably the Palais ae la Découverte ( 1937) and the lecture rooms of the Musée Guimet (five large frescoes on the life of Buddha). Exhibits with the Groupe de la Réalité Poétique at the Galerie Romanet in 1956.