Background/Aims: Bladder and bowel dysfunctions are both prevalent health problems in pediatric population. The Childhood Bladder and Bowel Dysfunction Questionnaire (CBBDQ) is a parent-reported tool to evaluate and quantitatively assess bladder and bowel dysfunction symptoms in pediatric patients. This study aimed to translate the CBBDQ into Turkish language and culturally adapt it for use among 5-12-year-old children. Moreover, this study was also aimed to determine the reliability and the construct validity of the Turkish version. The main hypothesis of our study was that the CBBDQ would be translated into Turkish and culturally adapted so that Turkish parents could understand it. Additionally, we estimated that the Turkish version would have eventual internal consistency and test-retest reliability and admissible construct validity.Materials and Methods: The CBBDQ was translated into Turkish language as per the guidelines and given two times to the parents of children with one-week interval to assess the test-retest reliability. The internal consistency was determined using the Cronbach’s α value and the test-retest reliability was calculated using the inter-rater correlation coefficient. In the estimation of the construct validity, the dysfunctional voiding and incontinence scoring system (DVISS) and the pediatric quality of life inventory (PedsQL) in 5-12-year-old children were used as the external criteria.Results: The participants were parents of 5-12-year-old children. The internal consistency was 0.83, that was the Cronbach’s α value, which reflects a good result. The Turkish-CBBDQ5-12y and the DVISS showed a satisfactory correlation (r=0.64 p<0.001). There was no correlation between the Turkish-CBBDQ5-12y and the PedsQL-General Health and PedsQL-Psychological Health (r=–0.17, p=0.1 and r=0.12, p=0.25, respectively).Conclusion: The Turkish-CBBDQ5-12y is a reliable and valid instrument in terms of content and construction and can be safely used in clinical practice.