The purpose of this study was to compare effects of teachers' acceptance on principals' influence with that of assistant principals' influence on teachers' evaluation of their colleague group, task motivation, effectiveness of their educational activity and role expectation. The sample consisted of 106 school teachers. Teachers were classified as four types ((1)teachers who were much influenced by both a principal and an assistant principal (H-H), (2)teachers who were much influenced by a principal (H-L) , (3)teachers who were much influenced by an assistant principal (L-H), (4)teachers who were less influenced by both a principal and an assistant principal (L-L)). Results showed that teachers classified as H-H and H-L made more positive evaluation for their colleague group and effectiveness of their educational activity and role expectation than teachers classified L-H and L-L. The high constant magnitude of results obtained was interpreted as the importance of teachers' acceptance of principals' influence in the school organizations.