This research focused on attitude and practice of elementary Physical Education(PE) teachers toward obesity. The question is that how messages, symbols, conversations and teacher-centered interpersonal behaviors could creat attitude toward obesity? It seems that discourse might affect obese student’ s desirable feelings about their bodies, intentions of short-term or long-term physical activities, definition of exercise in daily life and habits. The data were collected using observations on PE class and interviews. Analysis were carried out by description of the concepts used in the discourse theory of Lacla and Moff (1985). Results showed two main discourses: creating “ fear of obesity” and “ health responsibility” . In both approaches, obesity is unaccepted and special consideration is given to obese students in the classroom. The major difference between these approaches is to create different perspectives to obesity. Attitude and practice by the teacher in health responsibility discourse can be accompanied by a sense of personal responsibility with awareness, but fear of obesity discourse trigger undesirable and humiliating feeling toward obesity among students.