All unidentified / unaccompanied & unknown TBI patients admitted in department of neurosurgery, Gandhi Medical College Bhopal from June 2016 to May 2019 were enrolled in this study. Management of unidentified and unaccompanied patients is difficult in any health care setup due to challenges in managing their day to day care. Traumatic brain injury is the most common cause of death in trauma patients.  We analyzed demography, mode of injury, clinical presentation & condition at admission, treatment given, hospital stay, outcome & factors affecting outcome of the patients. Very few studies in world literature are available on this subgroup of patients. We analyzed data pertaining to 100 consecutive patients at our hospital. Aim and Objectives: The aim and objective of this study is to determine the outcome of traumatic Brain Injury in patients who were admitted in trauma unit/ Neurosurgery unit of Gandhi medical College Bhopal India from June 2016 to May 2019. As unaccompanied / unknown/ unidentified. In this study we collected the data of unknown/ unidentified patients of TBI to analyze the outcome. Material and Methods: It was a prospective study of all unaccompanied/ unknown patients who were admitted in the trauma unit/ Neurosurgery unit of surgery department of Gandhi Medical College & Associated Hamidia Hospital Bhopal India from June 2016 to May 2019 a total number of 100 unidentified /unaccompanied patients were admitted whose data were collected and analyzed Departmental staff, social workers, police and media persons help were take in for relocation of unknown patients to their home or non government organization shelter homes . Results: There were total 100 consecutive patient enrolment in this study, 87% of the patients were male. Most common age group was 40-59 years, 48% patients falls in this age group. Most common cause of trauma was road traffic accident (48%), followed by Cause Unknown (36%). Overall mortality was 39%. Others clinical characteristic and type of lesion in traumatic brain injury of unidentified and unaccompanied patients is given in detail in. Out of 100 patients, 43 (43%) patients were managed conservatively based on CT head findings and neurological status & 57 (57%) were operated. Decompressive Craniectomy was most common operative procedure depending on the clinical & neurological status. Overall complication rate during hospital stay was 26%. Keywords: TBI, Unidentified Patient & Unaccompanied & Decompressive Craniectomy, Rehabilitation.