Background: Determining nurses’ attitudes and behaviors toward error reporting is important in providing safe, high-quality patient care. The current study aimed to test Turkish validity and reliability of the Incident-Reporting Attitude Scale for Staff in Long-Term Care Facilities. Methods: This psychometric study was conducted in two stages with 395 nurses and nurse managers in long-term care at a university hospital between May 2021 and January 2022. First, the Turkish adaptation of the scale was performed. The scale's internal consistency was evaluated using Cronbach's alpha and corrected item-total score correlation. Content validity indices were used for content validity, and exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were used for construct validity. Discriminant analysis and internal consistency coefficient were used for reliability analyses. Results: The results showed that the Turkish scale adaptation is adequate for language and content equivalence. According to CFA, the scale comprising 31 items and two subscales in the original version showed a significantly good fit in a 26-item and five-factor model. The Cronbach's alpha of the modified scale was 0.92; it was 0.88, 0.94, 0.82, 0.96, and 0.90 for the subscales, respectively. Conclusions: The Turkish scale adaptation has consistently shown acceptable psychometric reliability and validity characteristics. It can be used by healthcare services and nursing managers to evaluate nurses’ attitudes toward incident reporting in healthcare facilities providing long-term care.