The construct of L2 teacher immunity refers to the self-established protective shield that teachers develop against challenges posed by the instruction process. Therefore, the aim of the present study was to measure this construct of L2 language teacher immunity, which was put forward by Hiver and Dörnyei (2017), based on the constituents constructs such as teacher resilience, burnout, attitude, openness, classroom affectivity, and coping. The present study was designed as a quantitative study. A questionnaire, offered by Hiver (2017), was administered to 87 EFL teachers. Purposeful sampling method was used to select the participants. both experienced and inexperienced teachers were selected to enable comparison possible. Another point in the selection of the participants was to select those who hold postgraduate degrees as well. The results indicated that the EFL teachers in the present study have a moderate level of immunity. Moreover, results also indicated that although experience did not play a significant role in L2 teacher immunity, graduation was more important. Finally, the cluster analysis demonstrated that highly immunized tended to have lower levels of burnout and tend to use more coping strategies.