Posttraumatic stress disorder is characterized by symptoms of distress, that include re- experience of a traumatic event, avoidance, emotional numbness and hyperalertness. PTSD is becoming more and more frequent among Croatian war veterens, but also in domestic violence victims, in those who have survived an accident or a severe disease, and therefore, deserves the attention of the psychiatric community. PTSD was first recognized as a special diagnosis in the DSM-III classification, and today, DSM-V classification is used to determine the symptoms needed to diagnose PTSD. The clinical presentation of PTSD has been described before, but under the term traumatic neurosis. Many research were conducted in order to find certain associations between the severity of PTSD symptoms and outer and inner factors, especially after it was noticed that some individuals show posttraumatic growth, while others develop severe signs of depression and suicidality. One of these factors is religiousness, and it has been shown that it might have an important role in determining the way a person reacts to trauma, and consequently, in the possible development of PTSD. After being exposed to a traumatic event, a person loses the feeling of self-efficiacy and stops believing in the benevolence of the world. Religiousness can help people to cope with the trauma. After being exposed to such an event, they might tend to engage more in religious activities, eiher organizational, such as attending a mass, or non-organizational, such as praying. Higher religiosity was associated with less severe symptoms of PTSD, especially suicidal thoughts. Further research on this topic is necessary in order to elucidate whether religiosity might offer relief in patients with PTSD who accept this kind of treatment.