Background: This research intended to explore the effect of teacherschr('39') job satisfaction on their performance with focus on ethical consideration in some the high schools of Keman. More specifically, the present paper explored Iranian EFL teachers’ attitudes towards job satisfaction and ethical issues. It also assessed their performance and ethical matters in the EFL classes. Moreover, the study investigated relationship between teacherschr('39') job satisfaction and their performance with regard to ethical consideration. Method: To do this, 30 Iranian EFL teachers from both genders were selected as the participants of the study that were chosen based on available sampling. Two related questionnaires, Teacher Job Satisfaction Questionnaire (TJSQ) and Characteristics of Successful EFL Teachers Questionnaire (CSETQ) were employed for gathering data. The questionnaires were published among the EFL teachers of three high schools, and they had to answer them without time limitation. After that, the questionnaires were collected by the researcher and the data were analyzed using SPSS software. Results: The obtained results indicated that the teachers had positive attitude on job satisfaction and their performance in the EFL classes. Also, the findings of the study revealed that there was a significant relationship between the mentioned variables. Conclusion: It can be said that teacherschr('39') job satisfaction had impact on their performance in the EFL classes.