The present questionnaire-based study examines 379 Greek teachers' perceptions about professional satisfaction and dissatisfaction. According to the results, teachers are professionally satisfied when they, firstly, feel able to effectively establish behaviour and communication rules in their classrooms, secondly, respond to students' expectations and cooperate with parents and the school administration, thirdly, are supported by colleagues and educational services and, fourthly, share experiences in a collegial atmosphere. Job dissatisfaction, on the contrary, is reported to derive firstly from Curricula restrictions, secondly from a lack of specialized knowledge about teaching, and thirdly from the lack of a reliable assessment procedure.