Rationale:The number of pediatric surgeries is constantly increasing. Evaluating anxiety levels in pediatric surgical patients is highly important in terms of preventing complications. Aims and Objectives:The purpose of this study is to cross-culturally adapt to the Turkish version, and to test the validity and reliability of Children's Perioperative Multidimensional Anxiety Scale (CPMAS).Method: This methodological study was carried out with 50 children aged 7-10 years who underwent surgery at Bartın Obstetrics and Pediatrics Hospital between September 2021 and May 2022. The self-reported CPMAS and Children's Anxiety Meter-State (CAM-S) were administered before the surgery, on the day of the surgery, and 1 month after the surgery to collect data. The internal consistency, test-retest reliability, parallel forms reliability, content validity, and construct validity of CPMAS were tested.Results: Children's Perioperative Multidimensional Anxiety Scale showed a high level of internal consistency (Cronbach's alpha = 0.858, 0.916, 0.864). The item-total correlation values of CPMAS were found to be 0.58-0.71 before the surgery, 0.77-0.83 on the day of the surgery, and 0.60-0.80 1 month after the surgery. CPMAS was found to be a single-factor scale explaining 65% of the variance in the examined variable. The correlations between CPMAS and CAM-S (parallel forms) were found to be 0.474 before the surgery, 0.528 on the day of the surgery, and 0.599 1 month after the surgery. Conclusion:The CPMAS, which was developed by Chow et al. in English, had high validity and reliability levels for Turkey. It is recommended that the scale be used by healthcare professionals in Turkey in the assessment of surgery-related anxiety in children.