Obesity is the most frequent chronic metabolic disease globally. Aim: The aim of this work is to evaluate metabolic effects of mini gastric bypass surgery on diabetic morbidly obese patients within 6 months regarding; Mean operative time, Hospital stay, Rate of weight loss during follow up period of 6 months, Intra-operative and Post-operative complications, Diabetic remission by follow HbA1c and fasting blood sugar. Results: In a comparative study between MGB and RYGB, the results showed that mean operative time was 105 min for MGB, 152 min for RYGB. There was higher EWL% with the MGB bypass group after 6 months post-operatively to in comparison to RYGB, while EWL % at the first 6 months post-operatively were the same in both MGB and RYGB (Disse et al., 2014). All co-morbidities as... Diabetes mellitus type 2, dyslipidemia, sleep apnea and hypertension, were improved after MGB and RYGBP procedures. Remission rates of these co-morbidities were similar between both groups, 6 months after surgery (Disse et al., 2014).Conclusion: There was a significant reduction of mean BMI in LMGB, while %EWL and %BMIL more prominent in LMGB. There was significant shorter operative time and less post-operative hospital stay. There was obvious amelioration of obesity related DM in MGB but LMGB have higher rate of resolution.