© 2022 American Society of PeriAnesthesia NursesPurpose: To test the validity and reliability of the Turkish version of the Children's Perioperative Multidimensional Anxiety Scale (CPMAS). Design: Methodological research model. Methods: One hundred children (81% male) aged 7 to 13 years undergoing elective surgery at a tertiary university hospital were included. Self-administered CPMAS and State-Trait Anxiety Inventory-Children were used to collect data at preoperative, operation day, and a month after the operation. Internal consistency, test-retest reliability, parallel form reliability, and content and construct validity of the tools were determined across all three visits. Findings: The CPMAS demonstrated good test-retest reliability (ICC = 0.51 to 0.78) and good internal consistency (Cronbach's alpha = 0.78 to 0.81). Inter item correlation values were ranged from 0.20 to 0.62 at preoperative, 0.32 to 0.64 on the day of operation and 0.36 to 0.75 at a month after the operation. CPMAS single-factor construct and the explanatory percentages were 0.54 and above. After Pearson correlation analysis, CPMAS was moderately correlated with State-Trait Anxiety Inventory-Children at T1 (r = 0.54, P < .01) and T2 (r = 0.56, P < .01). Conclusions: The Turkish version of CPMAS has good reliability and validity score. Therefore, it is a suitable instrument to assess perioperative anxiety in 7 to 13 years old children in a clinical setting.