Innovative activity of teachers becomes especially important in modern society and educational system when new educational paradigm, emphasizing learning as process, which is not related to systemic, organized teaching any longer, and it is considered as activity in which people develop their knowledge, skills, values, attitudes, and experience (Juceviciene, 2001), gains its foothold. For this purpose the research of secondary school teachers' innovative activity, the results of which are presented in the paper, was carried out in Lithuania, the country undergoing transformations and seeking the membership in the European Union. There were 600 teachers and 100 school principals participating in the research. The method of questionnaire survey was applied. The paper seeks to answer the following questions: á What motives influence innovative activity of teachers? á How do teachers' attitudes influence the innovative activity? á What factors of school's internal environment influence teacher's innovative activity? etc.