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Background and Objective: Leptin has a key role in obesity and type 2 of diabetes. This study was done to compare the effects of eight weeks aerobic and combined training on serum levels of leptin and glucose in type 2 diabetic men. Method: This clinical trial study was performed on 24 men with type 2 diabetes whom reffered to Taleghani Hospital in Kermanshah, West of Iran during June to August 2012. The patients were randomly divided into 3 groups including aerobic training, combined training (aerobic and resistance training) and control groups. Training protocols included three 1-hour sessions per week for eight weeks. Subjects in the control group did not participate in any physical activities. Serum levels of leptin and glucose were measured 48 hours before and 48 hours after intervention as fasting values in pre-and post-tests. Results: There was no significant difference between groups at pre-test for serum levels of leptin and glucose. After intervention, serum level of glucose in the aerobic group and serum level of glucose and leptin in the combined group were significantly reduced in compared to the controls (P<0.05). Conclusion: Aerobic and combined training with beneficial effects on the sera glucose level are recommended for patients with type 2 diabetes. However, combined training, regarding reducing leptin level seems to be more useful for these subjects.