Chinese parents who lost their only child are at high risk of mental health problems. Peer support seems to be a crucial resource for their adaptation. Semi-structured interviews were conducted with 15 participants to explore peer support experiences in this population. Three forms of peer support were identified, namely, online groups, offline activities, and one-to-one contacts. The functions of support included emotional, instrumental, and informational support. Some unique characteristics emerged (e.g., negative experiences). Certain challenges were identified (e.g., lacking professional guidance). The findings indicate that future interventions focused on peer support should be developed.