The purpose of this study is to investigate teachers' organizational socialization levels and perceptions about leadership styles of their principals. Research was conducted with 361 teachers. Research design is determined as survey and correlational. Multi-Factor Leadership Scale originally was developed by Bass (1999) and adapted to Turkish culture by Akdogan (2002) and Organizational Socialization Scale developed by Kartal (2003) were used to collect data. According to the findings: only teachers' perceptions about laissez-faire leadership differ according to gender. Teachers' perceptions about leadership styles and organizational socialization levels do not differ according to seniority, age and tenure in school. The causes of these findings can be investigated There is a significant negative relationship between teachers' motivation and their perceptions about laissez-faire leadership style and there is not any significant relationship between subscales of organizational socialization and leadership. These variables can be affected by other variables and they may be investigated.