This paper had two aims to clarify the problem concerning development of the curriculum of Music courses. The first was to illustrate the background of the reform of the curriculums focuses on Music courses in United States and Japan; especially investigate the records of the important symposiums and conferences which influenced on the reforeming of Music courses. The second was to examine the characteristics of developmental aspects of Music course. In the 1960's the structures and constructions of education whose productivity rate were not highly have begun to improve caused by the Sputnik 1957. In the field of natural sciences, the framework of discipline-centered-curriculum was concept which aimed to modernize the course structures of Mathematics, Sciences and Physics. The concept of discipline-centered-currichlum have introduced to Japan as "the reformation of curriculum", which influenced on evolving the construction of the theories of educational methodology, curriculum research and development. However, discipline centered curriculum have researched not only in natural scientific courses but also art courses in the United States.