ABSTRACT
The main purpose of this research is to investigate the relationship between organizational citizenship behaviours and value preferences of teachers and principals. The participants of this research includes 252 principals and teachers who are on duty in state schools in west side of Istanbul province. In addition, in the research personal information form, Schwartz value scale and Yücel organizational citizenship behaviours scale are used for collecting data. As result of the analyses, there is a meaningful relationship between the value preferences the organizational citizenship behaviours. As the importance given to the organizational citizenship behaviours increases, also the organizational citizenship behaviour increases.