BackgroundTerrorist attacks occurred in Paris in January 2015.AimsTo assess the mental health impact and the access to psychomedical care of people exposed to the attacks.MethodWe implemented an open-cohort design 6 and 18 months after the attacks. Exposed civilians and rescue workers were included according to the exposure criteria A for post-traumatic stress disorder (PTSD) in DSM-5. A face-to-face questionnaire conducted by trained psychologists was used to collect sociodemographic characteristics, exposure level, scores on psychometric scales, an international neuropsychiatric interview and access to care.ResultsSix months after the attacks, 18% of civilians reported symptoms of PTSD, 31% had anxiety disorders and 11% depression. Among rescue workers, 3% reported symptoms of PTSD and 14% anxiety disorders. During the 48 h following the attacks, 53.2% of civilian had access to psychomedical carev. 35% of rescue and police staff.ConclusionsWe found severe psychological consequences, even in people who were less exposed.Declaration of interestNone.