This paper deals with the comparison of students' misbehaviours in Turkish and English primary classrooms. A field study was conducted in order to discern students' misbehaviours based on students' age, gender, time of day, seating arrangement, types of learning activities and subject matter. Semi-structured in-depth interview and systematic classroom observation were used to collect data from two different cultural contexts. Participants in this study were 20 primary school teachers. The results show that there are differences and similarities between Turkish and English primary classrooms in terms of the causes and types of students' misbehaviours. Certain misbehaviours that are caused by different cultural and educational contexts are frequently observed either in English or in Turkish classrooms.