school furniture [17]. It had been reported that prevalence of bad back are 33.3% in high school students and 22.8% in 6-12 ages. Therefore, it due to effect of undesirable sitting position in incidence of skeletal abnormality and physiological disorder, furniture used by students, which should make in proportional with students bodily dimensions and based on ergonomics standards. Researchers have identified a surprisingly high prevalence of back pain among schoolchildren and adolescents [18, 19]. Studies of back care education have been conducted in Europe [20], but the inclusion of this subject in schools is not universal. Many have concerns with the loads that students carry in book bags and backpacks [21,15]. The purpose of this study was investigation the effects of classroom furniture upon neck, leg, arm, back and lumbar pain and fatigue in student when used them. Evaluating the desk and bench position that was locating of school blackboard with regard to observance of ergonomic standards and also it’s proportional with student's anthropometrics characteristics