Most of the advocates of 'Musische Erziehung (education)' which is peculiar to modern Germany look to F.v.Schiller (1759-1805), a humanist of the German classical period, for their thoretical foundation in Aesthetic Education Theory. Schiller thought that Aesthetic Eduacation can free a man from both his material desires and his rational constraints, so that it can cultivate a man into a humane being. Namely, he had a political intention. His concrete method was to build communities with humane freedom through the aesthetic communication (beautiful social relatiohs). In this treatise I show this by quotations from many works on 'Musische Erziehung' between the 1840's and the 1970's and by my analyses of them. Incidentally, 'Das Musische' means not only the Things Musical, but also the aesthetic-artistic sense of persons too. Therefore, we can think that 'Musische Erziehung' is a political way to create a free society through social relations based on the sense of 'Das Musische'.