Traumatic brain injuries are one of the leading causes of mortality, morbidity, and economic burden in context to Nepal. Non-contrast computed tomography is used for rapid diagnosis and repeat computed tomography helps to detect the progression and complications of cerebral injury. The aim of this study was to find out the prevalence of traumatic brain injury among patients admitted in the neurosurgical unit in a tertiary care centre. This descriptive cross-sectional study was conducted among patients admitted to the neurosurgery unit in the tertiary care centre from 1 August 2019 to 29 August 2020. Ethical approval was taken from Institutional Review Committee (Reference number: CMC-IRC/075/076-156). Convenience sampling method was used. Point estimate and 95% Confidence Interval were calculated. Among 350 patients admitted in the neurosurgical unit, the prevalence of traumatic brain injury was 140 (40%) (34.87-45.13, 95% Confidence Interval). Change in management was required among 28 (20%) when computed tomography was done within 12-24 hours. Among them, 27 (19.29%) underwent surgical intervention after a repeat computed tomography scan. The prevalence of traumatic brain injury was found to be higher than similar studies done in similar settings. contusion; craniotomy; traumatic brain injury.