Background Laparoscopic Sleeve gastrectomy (LSG) was utilised in super-obese patients with at least two serious co-morbidities as a first step of a multi-phase treatment. The objective of this research is to assess the effectiveness of laparoscopic sleeve gastrectomy in treating and improving type II diabetes mellitus. Methods: this research included 40 patients with diabetes, morbid obesity and laparoscopic pulmonary gastrectomy and post operational follow-up for 6-12 months, by measuring serum haemoglobin A1c (HbA1c) and fasting glucose blood for their condition. Results: 67.5% of our patients analysed were female and the remaining 32.5% were male and their age varied from 21 to 44 years with average age 31.3 ± 8.1. Only one individual reported of postoperative haemorrhage without surgical death. With respect to connections between HbA1c, Body Weight and BMI, before and 6 & 12 months postoperative data, there were significant connections between BMI at 6-12 months postoperative and HbA1c at 12 months postoperative. At the three observations "preoperative and 6 & 12 months postoperative," however, no significant association was identified between body weight and HbA1c results, Conclusion: LSG is more useful for obesity and diabetes resolution in morbidly obese diabetic patients. However, more observation is still necessary to determine the effects of LSG on hypertension and hyperlipidemia.