Background: Delirium is common in palliative care settings and is distressing for patients, their families and clinicians. To develop effective interventions, we need first to understand current delirium care in this setting. Aim: To understand patient, family, clinicians' and volunteers' experience of delirium and its care in palliative care contexts. Design: Qualitative systematic review and thematic synthesis (PROSPERO 2018 CRD42018102417).