BACKGROUND AND AIMS: Older adults' chronic pain care includes assisting with daily activities and exercise. But the informal caregivers have stated different challenges in the caring process. This study aims to explore the chronic pain situations of older adults, the burden of their informal caregivers, and the correlation between the severity of chronic pain in older adults and the level of burden experienced by their caregivers. METHODS: A total of 150 older adults (mean age: 65.44) with chronic pain and 150 informal caregivers (mean age: 41.06) were recruited for this study. Older adults completed the brief pain inventory and pain self-efficacy questionnaire. Depression, anxiety, stress, and activities of daily living were assessed. Informal caregivers also completed the caregiver burden inventory. RESULTS: 150 informal caregivers completed the questionnaire. The mean caregiver burden score was 3.73, positively associated with pain conditions and emotional tolls in older adults. CONCLUSION: The findings highlight the need for healthcare professionals to address the physical and emotional burdens experienced by informal caregivers. Healthcare professionals should investigate the caregiver burden. Comprehensive support strategies should be developed to enhance the well-being of both older adults and their caregivers, ultimately improving pain management and quality of life.