Introduction: Frontotemporal dementia is a common cause of dementia. It is easily misdiagnosed as a psychiatric illness due to its presentation with behavioral problems, mutism, language problems and in some cases with aggression and antisocial behavior. Case Report: We report a case of a 72yearold man who presented with behavioral abnormalities, lack of personal hygiene, personality changes of gradual onset for 2-3 years, suggested by inability to take care of self, mutism, social disinhibition in the form of micturition in the presence of family members. Computed tomography (CT) scan of the brain showed atrophy of frontal and temporal lobes. The family members were counseled for the outcome and prognosis of the case. Conclusion: The diagnosis of frontotemporal dementia is made based on presentation, diagnostic criteria and brain imaging. Definite treatment is not available, but treating according to presenting complaints of the patient is helpful; e.g. if the patient has depression, antidepressants along with family counselling about the progression of the disease and awareness about requirement for the family support are important.