This study investigated the relationship between attachment, mood and deliberate self-harm (DSH) in a nonclinical population (n = 114). In addition to a range of risky behaviours, the most commonly reported DSH behaviours were Head-banging (47%), Hitting (46%), Scratching (38%) and Cutting (34%). Those who engaged in DSH had poorer quality of attachment to both parents but not peers, and higher levels of depression, anxiety and stress. Path analysis was then used to examine the interaction between attachment, mood and DSH. The impact of the quality of attachment on DSH was found to be mediated by stress, which suggests that DSH may be a maladaptive coping mechanism. Attachment to father and peers was found to be more influential than attachment to mother. Our findings suggest that DSH may be more prevalent in the community than previously recognised, and that attachment, which is currently neglected in DSH research, warrants further investigation in both clinical and nonclinical populations.