Agency is a significant element in both teacher education and school improvement because it informs how teachers make sound professional decisions. As such, the present study attempted to explore (a) Iranian university instructors’ conception of teacher agency; (b) components of teacher agency; and (c) the role of initial motives on the instructors’ professional agency. To address these issues, benefiting from purposive sampling, five participants were interviewed using the semi-structured interview as the main instrument. The findings indicated that Iranian university instructors believe that teacher agency is an important element in both language teaching and real-life contexts. As for the second concern of the study, the results revealed that personal, professional, and critical components are important. Regarding the third one, initial motives influence instructors’ professional agency. It seems the overall profile of teacher agency in the Iranian context consists of the following key components extracted from the interviews, namely, decision-making, professional development, purposeful acting, making changes, self-reactiveness, intentionality, and forethought. Based on the major findings of the study, concluding remarks are discussed and some tips for further research are presented.