Objective: Establish the relationship between the types of traumatic experiences, number of traumas, age at the time of traumatic events with psychopathological symptoms and aggression in an Ecuadorian prison. Method: A cross-sectional study with 101 offenders from Ambato's Detention Center in Ecuador. Results: Of the prisoners in this sample, 27 have PTSD. Incarcerated individuals who have suffered intentional trauma, multiple traumas, and trauma before the age of 18 show higher levels of psychopathological symptoms and aggression. Conclusions: This study highlights the importance of mental health care in prisons. Research outcomes are relevant for future investigation in Latin American prisons for the design and implementation of trauma-related interventions. Trauma-focused interventions can prevent violence and mitigate its consequences. (PsycInfo Database Record (c) 2022 APA, all rights reserved).