["Criminal Behaviour and Mental Health, EarlyView. ", "\nAbstract\n\nBackground\nPrevious research with general population samples has consistently shown that forgiveness and mindfulness facilitate coping with distressing experiences and significantly promote mental health. No study, however, has examined their unique contribution to prisoners' psychological wellbeing nor has considered the different forms of self‐forgiveness among prisoners.\n\n\nAims\nOur aim was to investigate the role of mindfulness in mediating any association between prisoners' self‐forgiveness and psychological wellbeing and to test whether any such links are moderated by years spent in prison. In this study self‐forgiveness was conceptualised as a multidimensional construct, including presence of genuine self‐forgiveness, absence of pseudo self‐forgiveness and/or absence of self‐punitiveness.\n\n\nMethods\nParticipants were recruited from a prison in Northern Italy. Consenting men were asked to complete an anonymous self‐report questionnaire with only a researcher present.\n\n\nResults\n104 male prisoners (mean age 46.63 years, SD 11.38) took part. Findings were that self‐punitiveness was inversely related to well‐being, with mindfulness mediating this relationship, this while controlling for the other dimensions of self‐forgiveness and the perceived severity of the crime committed. Contrary to expectation, we found no direct relationship between genuine self‐forgiveness and well‐being, but the moderated mediation models showed that genuine self‐forgiveness was positively associated with mindfulness and, through this, had an indirect association with wellbeing, significant only for prisoners who had already spent several years in prison.\n\n\nConclusions\nOur findings confirm that self‐forgiveness is a complex construct, worthy of further investigation among offenders. They suggest that forgiveness interventions for prisoners should include modules aimed at primarily reducing self‐punitive attitudes. Promotion of genuine self‐forgiveness should be tried only with awareness that this is likely to take a very long time. In such circumstances, interventions may promote energy to be invested in mindful processes with a consequent improvement in psychological wellbeing.\n\n"]