Teachers' innovative behaviour influences not only their teaching practices and professional habits, but also has an impact on students' creation of novel and original ideas. In spite of the increasing demand for innovative behaviour, and also relatively high academic achievements of Estonian students in international comparison, teachers in Estonia often do not use innovative teaching practices, according to "Teaching and Learning International Survey" (TALIS). This study explores possible school environmental factors that may support the innovative behaviour of teachers. A model, where self-efficacy as a trait and different types of teaching practices as behaviour, are components of the model of teachers' innovative behaviour. It is supposed that teachers' innovative behaviour appears in school environments and may be supported by the following factors: interaction and involvement, need and freedom for innovation. The study is carried out as a secondary data analysis, based on a sample of TALIS survey. The results indicate that although the three factors mentioned do not constitute the integrated phenomenon, they do describe different aspects of a teachers' innovative behaviour.