This study aims to examine the relationship between trust and extra effort implementing reform, and relationship between trust and extra effort are mediated by collaboration. The study was carried out in elementary schools in Turkey. Faculty trust in schools was measured using the Omnibus T-Scale, collaboration was measured using collaboration scale, and extra effort to implement reform was measured using extra effort inventory. In this study, it was found that the trust in principal had indirectly effect on extra effort implementing reform through collaboration with principal, whereas trust in colleague had both directly and indirectly effect on extra effort via collaboration with colleague.