Context: Theory of mind (ToM) is one of the social cognition skills. Deficits of ToM in individuals with traumatic brain injury (TBI) impact adversely on their social functioning and generally, their life style. Objectives: The current study aimed to assess ToM skill among adults with TBI. Data Sources: The terms of traumatic brain injury, head injury, closed head injury, head trauma, social cognition, theory of mind, mind reading, and adult were searched in databases of PubMed, PubMed Central, Google Scholar, ScienceDirect, Taylor and Francis Online, Willey Online Library, and Springer. Data Selection: The inclusion criteria were the recruitment of adult subjects with TBI and relevance to ToM skills. Exclusion criteria were relevance to the other social cognition (other than ToM) and non-social cognition skills in TBI, and relation to ToM skills in children and adolescents with TBI. Data Extraction: Type of study, sample size, task name, type of task, control question, and results were the main categories considered in the current review. Results: The current review study covered 35 articles about different types of ToM impairment in individuals with TBI. The majority of the studies were case-control comparisons on ToM in TBI populations regardless of the lesion location, including story-based tasks. TBI patients are impaired in mental state inference (ToM), and non-mental state inference. Conclusion: Patients with TBI were impaired in mental tasks (ToM) and non-mental tasks (more in non-mental verbal tasks compared with non-verbal ones), which indicated that persons with TBI had no special impairment in ToM skills.