This lecture-recital investigated the lineage of French composers who were influenced by jazz during the first half of the twentieth century, with a focus on compositions from the solo trombone repertory. Historically, French composers, more than those of other European countries, showed an early affinity for the artistic merits of America's jazz. This predilection for the elements of jazz could be seen in the selected orchestral works of Les Six and the solo compositions of the Paris Conservatory composers. An examination of the skills of major jazz trombonists early in the twentieth century showed that idioms resulting from their unique abilities were gradually assimilated into orchestral and solo repertory. Orchestral works by Satie, Milhaud, and Ravel works showing jazz traits were investigated. Further, an expose of the solo trombone works emanating from the Paris Conservatory was presented. Although written documentation is limited, comparisons between early recorded jazz trombone solos and compositions for orchestral and solo trombone was established. These comparisons were made on the basis of idiomatic jazz elements such as high-tessitura ballad melodies, blue tonalities and harmonies, syncopated rhythms, and many of the aspects of style associated with improvisation. All major French solo trombone repertory to mid-century was surveyed and examined.