Introduction. The connection between traumatic childhood experiences and the consequential appearance of psychopathology in adulthood is the subject of a lot of research. This study looks for a connection between childhood trauma and depression in adult suffering from schizophrenia. Aim: To analyse the correlation between depression and different categories of childhood trauma in adult suffering from schizophrenia in order to provide efficient treatment and reduce the levels of depression. Methods: This research is cross-sectional study and it was conducted at the Clinical Hospital Centre Sestre milosrdnice in Zagreb in 2022. The data was collected through a questionnaire on socio-demographic data, a Childhood trauma questionnaire and using the Beck Depression Inventory. The data for the difference in levels of depression between participants with various sociodemographic characteristics and also between the participants with various risky factors are examined through T-test and through the simple analysis of the variance, while their connection was calculated using Pearson's correlation. The predictive value of some variables on the variability of depression is tested using the hierarchic multiple regression analysis. Results: 104 patients with schizophrenia participated in this research. Depression is significantly related to all categories of childhood trauma. The biggest and statistically most significant positive correlation has been found between depression and emotional neglect while the lowest but statistically significant and positive correlation has been found in the cases of sexual abuse. Exposure to a higher number of different categories of childhood trauma results in higher levels of depression. The differences in the level of depression depending on socio-demographic characteristics are not found. The level of depression is significantly and negatively related to faith in healing. Conclusion: Adults suffering from schizophrenia who have higher results on the scale of trauma are much more depressive in adulthood unlike those who have lower results of trauma. Adults suffering from schizophrenia who are associated with higher levels of emotional neglect and abuse during their childhood tend to be more depressive than those who are not. There is no connection between depression and socio-demographic characteristics. Patients who believe in healing are less depressive than those who do not.