Abstract: The study aims to explore EFL teachers' perceptions towards common professional development activities at some lower secondary schools in Hue city. A survey questionnaire was conducted to gain responses from fifty EFL teachers at different lower secondary schools in Hue city. The second instrument of interview was employed to qualify data obtained from the questionnaire, and participated by twenty teachers. The findings indicate that most EFL teachers had positive attitudes towards the necessity of common professional development (PD) activities and they had different opinions about the reality of practicing common PD activities at their lower secondary schools. Specially, team teaching activities, using peer observations were paid more attention to than the others. Frequent use of common PD activities such as keeping diaries or recording the lessons, participating in academic activities or engaging in discussion groups and mentoring activity was also reported. Furthermore, the study also shows that there were some factors hindering the practice of common PD activities such as lack of knowledge, lack of motivation, inadequate educational technology and lack of collaboration between EFL teachers and the main factor was lack of time.Keywords: EFL teachers' perceptions, common PD activitie