Canal of Nuck in females is corresponding to processus vaginalis in males.Defects in canal of Nuck are rare conditions that appears usually early in young females.Failure of complete obliteration of the canal of Nuckresults in an indirect inguinal hernia or a hydrocele of the canal.In this study, we present a 28 year old married lady with cystic lesion in the right inguinal canal diagnosed as- cyst of canal of Nuck.Surgical excision was done plus repair of canal defect using proline mesh.