Abstract
organizational commitment of Germis secondary school teachers in academic year 2011-2012. Four-hundred secondary school teachers consisted the statistical population of the study. The determined sample size by the Cochran formula was 196. The sample was selected through simple random sampling. The data obtained through Bass and Avolios multifactor leadership questionnaire (1996) and Porters organizational commitment questionnaire (1974). The results showed that there was a significant positive correlation between transformational leadership and organizational commitment of teachers. In addition, step wise regression analysis demonstrated that among the components of transformational leadership, the idealized influence had the greatest impact on organizational commitment of teachers.