This study explored the intergenerational continuity of adverse childhood experiences (ACEs) in a male justice-involved population. 294 fathers aged 18-69 years in a Welsh prison completed a questionnaire exploring their exposure to ACEs. The questionnaire also measured the ACE exposure of each child they had fathered. The study found evidence for the intergenerational continuity of ACEs. Paternal ACE exposure was found to increase the risk of child ACE exposure, both to multiple ACEs and individual ACE types.