Objective of this study has been identified as determination of respiratory parameters and aerobic capacity of 28 male referees (B-C-D) working in different classifications. Respiratory parameters like forced vital capacity (FVC), vital capacity (VC) and maximum voluntarily ventilation (MVV) and maximum inspiratory pressure (Mip) and maximum expiratory pressure (Mep) measurements have been used in this study. Shuttle run test of 20 m has been applied for determination of aerobic capacity. Obtained data, were assessed in spss statistical analysis program with T-Test and Variance Analysis and findings were accepted as significant at p<0.05. When respiratory parameters of referees were examined according to their sports activities, branches and duration of sportive activities no significant difference has been found (p<0.05), statistically significant difference was found between respiratory and Max. V O-2 values according to classification and working duration of referees (p<0.05),It was found that respiratory capacities of classification referees were better compared to other classification (D-C) referees because of their classification levels and duration of their services as referee. This situation results from their classification level and their long-term service as referee. Therefore it has been concluded that they have better respiratory level. Depending on this fact; it may be advised that other referees also should be trained well and individuals only starting refereeing should also be trained with more intense training programs to have high respiratory levels. (C) 2014 The Authors. Published by Elsevier Ltd.