PURPOSE: Brain tumours represent a significant burden for patients and caregivers. The aims of the present study were to explore the perceived benefits of support groups for patients and their caregivers, as well as the barriers to participation, and to generate suggestions for improvement. METHODS: Brain tumour patients and caregivers were recruited from the brain tumour centre at Princess Margaret Cancer Centre to participate in focus groups. Focus groups were audio-recorded, transcribed, and thematically analysed using qualitative methods. Eight patients (five who had attended the support groups and three who had not) and eight caregivers (all of whom attended the groups) participated in separate focus groups. RESULTS: Five major themes emerged: group cohesion (e.g., camaraderie and kinship), motivating factors to attend (e.g., loneliness), logistical factors that affected attendance (e.g., transportation), structure and content of the group (e.g., discussion topics), and suggestions for improvement (e.g., receiving personal reminders). CONCLUSIONS: This study highlights the supportive needs of brain tumour patients and their caregivers. The key findings provide helpful information on how to maximise the benefits of support groups for these populations.