The perception form of the body language behaviours of the session chairs by disputants affects the efficiency of the process. Therefore, it is important to determine the effects of the mimic, gesture, physical appearance and tonality and accent of the chairs on disputants. That research was conducted to clarify how the disputants perceive the body language behaviours of the chairs of the sessions. Data was gathered with a scale which is valid and reliable. The students were given a list of the body language behaviour group and they were asked how they would affect the chair of the session using that language. As a result of the analysis of the collected data, the disputants find the mimic, gesture and physical appearance of the chair as negative; they perceive the tonality and accent as very negative. It is also determined that there is a positive relationship and a meaning between the perception level of the disputant and the mimic, gesture and physical appearance, tonality and accent of the chair. In addition, it is also ascertained that the gender of the disputants and the features of family environment they grew up in affect their perception of the body language behaviours of the chair. (Contains 6 tables.)