This study aims at figuring out empirically levels of principal s educational leadership and teacher learning communities(TLC) perceived by teachers of secondary schools in Jeollabuk-do and analyzing the influences of principal s educational leadership on the TLC in secondary schools. In order to achieve the goal of the study, The survey was conducted by questionnaires online and in person on 387 secondary school teachers in 35 middle schools and high schools in 14 cities and countiees in Jeollabuk-do from March 21st to April 8th, 2016. The research results through those research analysis are summarized as follows. First, the entire average of the principal s educational leadership was 3.54 of 5, showing ordinary level. Except for the background variant of assigned teachers(t=2.01, p=.045), the other background variants showed no statistically significant differences between groups. Second, the entire average of level of TLC was 3.78 of 5, showing ordinary level. For levels of TLC different in background variants, it had no statistically significant differences. Third, between the principal s educational leadership and forming level of TLC showed significantly positive correlation(r=.669, p<.01). Through it, it was confirmed that the principal s educational leadership and TLC had higher correlations. Fourth, in simple regression analysis on influences of the principal s educational leadership on teacher learning communities, it affected 44.7% of changes in TLC and statistically, it was significant in p<.001. This shows that the principal s educational leadership affect to form TLC. These results means that if principal s educational leadership is realized, it will positively affect forming, maintaining, and developing teacher learning communities.