Five French organ composers, representative of the period from Widor to the present time, are identified in this study, and a comparative analysis of the works of each is made. The introduction includes the source of the data, the scope of the problem, the purpose of the study, the method of procedure, a brief historical background of the new French school of music, general characteristics of modern French music, and specific idioms of contemporary French organ composers, as exemplified in the works of the organists selected: Charles Marie Widor, Louis Vierne, Charles Tournemire, Marcel Dupre, and Joseph Bonnet. The compositions and musical contributions of Widor, Vierne, Tournemire, Dupre, and Bonnet, respectively, are discussed in Chapter II through Chapter VI. Chapter VII states a summary of the study and the conclusions drawn,