Purpose: The purpose of this study was to evaluate the validity and reliability of the Korean Version of the Nurses’ Self-Concept Instrument (NSCI) geriatric hospital nurses in Korea. Methods: Bilingual nursing professionals performed translation and back-translation. Reliability and validity of the content and construction of the instrument were confirmed. Internal consistency reliability was determined. Construction and concurrent validity were verified using fac-tor analysis and correlation coefficients. Results: The total 14 items for the Korean version of the Nurses’ Self-Concept Instrument (NSCI) were retained through item analysis. In explanatory factor analysis, four subcategories were pro-posed with their names of each factor: ‘Leadership’, ‘Staff relation’, ‘Knowledge’, and ‘Care’. The four factors accounted for 78.81% of the variances. The Cronbach’s α regarding internal consistency were .77~.91 for the NSCI subscales. Correlation among four subcategories ranged .62~.84. Conclusion: The findings show that the Korean version of the Nurses’ Self-Concept Instrument is reliable and valid for measuring professional Self-Concept of geriatric hospital nurses in Korea.