Dialysis adequacy is of the main determinants of survival and mortality in patients undergoing hemodialysis. Therefore, the present study was performed to determine the adequacy of hemodialysis in hemodialysis patients a military hospital. In a cross-sectional study, 44 patients in dialysis center were selected by convenience sampling in 2014. Demographics data using a researcher-made questionnaire and the adequacy of dialysis patients using formulas Spkt/v, URR and ekt/v was measured. Data were analyzed by SPSS version 20 statistical software. The mean hemodialysis efficacy indicators that was calculated with the formula Spkt/v, URR and ekt/v was 1.08±0.3, 58.36±9.43 and 0.13±0.12, respectively. It was indicated that only 29.5%(13 patients) had a desired dialysis adequacy, 47.7%(21 patients) had adequacy of dialysis close to the desired level, and 22.7%(10 patients) had undesirable adequacy of dialysis. Only 18.2%(8 patients) had a desired URR (upper than 65%). The measured dialysis adequacy in this study is not desirable and in most patients is lower than the standard rate. Therefore, it is recommended to evaluate periodically the adequacy of dialysis in dialysis centers and investigate the reasons of low efficacy of hemodialysis.