The present study was an attempt to investigate the relationship between EFL persuasive writing and critical thinking skills among student teachers at the Faculty of Education. The study investigated the relationship between EFL persuasive writing and the development of EFL critical thinking pre – posttest. The participants of the study consisted of 30 students of one group and was selected randomly from third year English department student teachers at the Faculty of Education. The instruments and materials of the study were: An EFL persuasive writing skills checklist which was divided into 7 main skills, 25 sub skills, an EFL persuasive writing test which were designed and validated to be used as a pre posttest, a rubric for assessing EFL persuasive writing skills, and critical thinking skills checklist which was divided into 6 main skills, 19 sub skills, a critical thinking test which was designed and validated to as a pre-posttest. The EFL persuasive writing and critical thinking were administered to the participants. The findings confirmed that there is positive relationship between the development of EFL persuasive writing and critical thinking skills among student teachers at the Faculty of Education.