Abstarct: The aim of this research is to analyze the effect of resistance training on the pulmonary function in type 2 diabetic patients. The research method is semi-empirical and the research design is randomized control-group pretest-posttest. The population of the research consists of all type 2 diabetic women in district two of Yazd. A month after the call, 58 women with type 2 diabetes volunteered to participat for this research. Thirty eight patients with type 2 diabetes, aged 40-55 years, were selected purposefully. After informed consent was signed, participants were filled out the questionnaires (including personal informations, medical and sport history), fasting plasma glucose and spirometry tests were measured in laboratory. The participants were randomly divided into 3 groups to perform resistance training (resistance training group, n=14; core resistance training group, n=14), control group (n=10). The supervised exercise programs were done for 12 weeks, 3 days/week and 60 to 75 min/day. Statistical comparisons between groups were performed by the one-way ANOVA test, followed by Tukey’s post-hoc test. Levels of statistical significance were set at P≤0.05. Results showed that there is a significant difference in WC (P=0.02) and WHR (P=0.001) between diabetic groups. However, no significant differences were observed in BMI (P=0.74), body weight (P=0.89) between them. Exercise increased FVC in core resistance training group compared with resistance training and control groups (P=0.001). However, the difference in FVC betwwen resistance training and control groups was not statistically significant (P=0.11). FEV1 increased in core resistance training group compared with control group (P=0.001), whereas no significant difference was observed in FEV1 between resistance training group with core resistance training (P=0.09) and control (P=0.08) groups. These results suggest that the core resistance training that targeting the central part of body such as the diaphragm is more effective than the resistance training with upper and lower body for improving the pulmonary indices. Therefore, for preventing the pulmonary complications it is recommended to use core resistance training as a low cost, safe and effective therapeutic method parallel to other practical methods