Peer support programmes among children whose parents have mental illnesses have rarely focused on how these children relate with peers in the general population. Therefore, this phenomenological study in Ghana involved interviews with 13 children (ages 10 to 17) living with parental mental illness to learn about their peer relationships. Data were analysed to identify the phenomenon's essential features and constituents. The study finds that peer relations entail secrecy, peer victimisation and abuse. To these children, keeping secrets about parental mental illness ensures they have 'normal' peer relationships like others, as troubled peer relationships can develop when peers are informed about the parents' mental illness. Name-calling, teasing and withdrawal persists when peers are aware of one's parental mental illness. Although the children perceive that they may find comfort in children who are in a similar situation, the pros and cons of developing peer support out of these in-groups have to be verified rather than assumed. It is recommended that helping professionals educate school children and address myths they have about mental illness and its impact on their relationships.parental mental illness, peer abuse, peer relationships, peer victimisation Key Practitioner Messages • Interventions should include peers who do not have parents with mental illness as participants. • Some children with parental mental illness may experience psychological difficulties due to stigma from peers. Social workers should identify these children and provide counselling support. • Schools should introduce mental health literacy curriculum to address norms and values around mental illness that perpetuate stigma.