Background: The increasing number of cancer survivors and the trend of shifting cancer treatments into outpatient clinics have increased rapidly the supportive care needs of patients with cancer. However, no brief assessment tool is available to screen for these needs. Purpose: In this study, we aimed to (a) translate and develop a nine-item Chinese version of the Supportive Care Needs Survey Screening Tool (SCNS-ST9-C) and (b) examine the psychometric properties of this tool in a sample of patients with head and neck cancer (HNC) in Taiwan. Methods: In this two-phase instrument validation study, the SCNS-ST9-C was translated and evaluated for content, face validity, and feasibility in Phase I and was examined for internal consistency reliability and construct validity (including factor structure and theoretically supported correlations) on a sample of patients with HNC in Phase II. Results: In Phase I, the SCNS-ST9-C was translated and developed by three bilingual doctoral-prepared nurse researchers (Chinese and English). A standardized score system ranging from0 to 100 was built, with higher scores indicating higher unmet supportive care needs. Good content and face validity were confirmed by five cancer care experts and 20 patients with HNC, respectively. In Phase II, 116 subjects were recruited. A clear four-factor structure, which incorporated one of the original five dimensions (sexuality care needs, with one item) into the dimension of psychological and emotional care needs, was identified using exploratory factor analysis. Good internal consistency reliability for the overall SCNS-ST9-C was supported by a Cronbach's α of .75 and its four subscales (domains). Good construct validity was also confirmed by the theoretically supported correlations. Better performance status and longer time since treatment completion correlated negatively with the SCNS-ST9-C (i.e., lower unmet care needs), whereas higher distress (anxiety, depression, and symptoms) correlated positively with the SCNS-ST9-C (i.e., greater unmet care needs). Female patients reported higher overall unmet care needs and psychological and emotional care needs and higher scores on the care and support needs subscale than male patients. Conclusions: The SCNS-ST9-C is a brief, low-burden, and psychometrically valid instrument that may be applied in ethnically Chinese settings. This tool takes 1–2 minutes to complete. Further testing of the psychometrics of this instrument in different cancer populations is recommended.