An Observational Study was undertaken at Department of Otorhinolaryngology, AIMSR from Jan 2020 - August 2021. The aim of this study was to observe the outcome of endoscopic tympano-mastoidectomy for tubotympanic type of CSOM. All the patients attending ENT OPD at AIMSR within the age group of 11-60 years, irrespective of sex with tubotympanic CSOM either unilateral or bilateral were included in this study. In our study of 50 patients, 40 patients had graft uptake after disease clearance and 8 had failure of graft uptake without chronic otorrhoea and 2 had failure with chronic otorrhoea. Through this study we concluded that Endoscopic Tympano-mastoidectomy for tubotympanic type of CSOM is an excellent technique for complete removal of disease especially frominaccessible areas of middle ear cleft