Tabi Fatima Zahra, Mohamed Marwa2021-09-142021-09-142021-06AN19-2021http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/25930Misbehaviour has a great effect on learners’ achievements and also affects the teaching learning process. The aim of this study was to identify the negative impact of EFL students' misbehaviours on teaching/ learning processes. This study is quantitative and qualitative whereby questionnaires were completed by EFL third-year license students and English teachers at Mohamed boudiaf/ M'sila University, and the gathered data is analyzed. the results indicated that there is a negative interference of misbehaviours on learning and teaching processes. The impact of misbehaving on classmates included: loss of concentration, loss of self-esteem and incidence of psychological injuries, and the impact of misbehaving on teachers included: thought of changing the courier and feeling of unavailability of teaching well. The study made recommendations for teachers on how to improve the situation.Thesis