This study investigated the characteristics of effective secondary school Iranian EFL teachers from students’ and teachers’ perspectives. To this end, 376 junior secondary school students and 32 EFL teachers teaching at various Iranian secondary schools participated in the study. A validated open-ended questionnaire was distributed among the student and teacher participants and asked for their opinions on key characteristics of an effective EFL teacher. A semi-structured interview was also conducted with the teacher participants to investigate why they deemed the characteristics important. The results of the content analysis of the data obtained from the questionnaire and the interview indicated that students and teachers were approximately of the same opinion, both highlighting teachers’ professional qualities (e.g., knowledge of the subject matter, ability to impart knowledge properly, etc.), classroom management-related qualities (e.g., involving all students by assigning pair work/group work activities, assessing their learning progress regularly, etc.), and interpersonal relationships as being of crucial importance for effective EFL teaching. However, they differed in the degree to which they perceived these qualities to be important
