PUPROSE: To systematically review the effectiveness of psychosocial interventions developed for informal caregivers of hemodialysis patients. METHODS: Relevant studies were identified through five electronic databases: PubMed, Scopus, Web of Science, ProQuest, and the CENTRAL. Randomized controlled trials (RCTs) and quasi-experimental studies describing interventions for informal caregivers of adult in-center hemodialysis patients (≥18 years old) were included and independently appraised by two reviewers using the Joanna Briggs Institute Statistics Assessment and Review Instruments critical appraisal checklists. RESULTS: Eleven articles evaluating eight intervention programs were included in this review, covering a total of 729 informal caregivers. Most studies implemented educational or psycho-educational interventions (n = 6). Psycho-educational interventions designed to promote caregivers' ability to care and to cope with the caregiving role had positive effects on burden and/or quality of life. Psychological interventions also had large effects on reducing the burden over time. CONCLUSIONS: There are still few interventions available to caregivers of hemodialysis patients. Psychosocial interventions showed great potential in improving the caregiver burden and quality of life. Further research with rigorous designs is needed to achieve stronger evidence on the extent of the current findings.