Objective: To evaluate the validity and reliability study of the Supportive Care Needs Survey for partners and caregivers of cancer patients in Turkish society (SCNS-P&C-T).; Methods: This cross-sectional survey followed by a test-retest reliability and psychometric validation study was conducted with 270 participants. The research data were collected using a patient and caregiver demographic survey, the SCNS-P&C-T, the Caregiver Strain Index, and the Hospital Anxiety and Depression Scale.; Results: Ten expert opinions were found to be consistent for content validity of the scale (I-CVI = 0.993, S-CVI = 0.956). The confirmatory factor analysis could not confirm the factor structure of the original scale. Therefore, an exploratory factor analysis was performed and the scale factor structure was determined. These factor structures are (a) psychological and emotional needs, (b) health care and information, (c) work and social needs, (d) communication and family needs.; Conclusion: The SCNS-P&C-T is a valid and reliable tool which can be used to identify unmet needs among caregivers in Turkish populations.