Aim: The aim of the study was to evaluate the surgical outcome of retro rectus (muscular) mesh repair for umbilical hernia in adults. Material and methods: A Prospective study was conducted in the Department of General Surgery, Patna Medical College and Hospital, Patna, Bihar, India for 24 months.All adult patients (age above 18 years) clinically diagnosed as umbilical hernia including in the study. All patients who underwent surgery were given perioperative antibiotics comprising of three intravenous doses of one gram ceftriaxone that is preoperatively, immediately after completion of surgery and eight hours after surgery. Drain if kept, removal was done after 48 hours and patient discharged thereafter. Patients were called for skin staple removal on the tenth postoperative day. Results: 80 patients who underwent retro rectus mesh repair for umbilical hernia were studied prospectively. The results were studied and analysed. The mean age of patients was 45.3±6.1 yrs (range 32-61). There were 65 females and 15 males who underwent hernia repair. The mean BMI was 28.3 (range 23-29). 19 patients had diabetes, 14 had hypertension, 12 had ischaemic heart disease and 3 had ascites. 12 patients had all three comorbidities together (diabetes, hypertension and ischaemic heart disease). 65 patients had reducible umbilical hernia while 15 had an irreducible hernia necessitating umbilical excision. The mean stay in hospital was 5.5 days (range 3-8 days). No postoperative complications were encountered. There was no recurrence. Conclusion: We concluded that the intermediate or retro rectus mesh repair for umbilical hernia in adults is a very safe and effective way for treating umbilical hernias.