The first purpose of the present study was to propose a measuring procedure of the macroscopic character of sociometric structure deduced from a graph theory called “sociometric condensation model”. In this model, the following five dimensions were proposed to identify the macroscopic structure: unity, centralization, polarization, hierarchism and density. The other purpose was to apply this model to classrooms and to investigate the relationship between the macroscopic character and pupils' school morales. Sociometric test and school morale questionaires were given to 31 classes in 5 elementary schools. The relationship between unity, centralization and hierarchism, and school morales was found.