Joshua Caslari was a Jewish liturgical poet who lived at Avignon about 1540. He wrote four elegies which are inserted in the manuscript Machzor of Avignon; his signature is found at the end of the last. Joshua Caslari is in all probability identical with the Jozué du Cayslar, named with Ferussol Pampelona, in a document dated 15 June 1558, as member-elect of the council of the Jewish community of Avignon.

 This article incorporates text from a publication now in the public domain: Richard Gottheil and S. Kahn (1901–1906). "Caslari, Joshua". In Singer, Isidore; et al. (eds.). The Jewish Encyclopedia. New York: Funk & Wagnalls.