This study was conducted to examine the adaptation of the Child Developmental Assessment Scale (CDAS) to Turkish and the developmental evaluations of 5-year-old children in terms of several variables. A survey model was used in the study. The study group of this research is composed of children aged 5-year-old who Attend independent public kindergartens of the Ministry of National Education in the county center of Bilecik and private nursery and day care homes. As data collection tools in the research, the General Information Form was developed by the researcher and the CDAS which had been developed (2014) by Andrée Pomerleau, Nathalie Vézina, Jacques Moreau, Gérard Malcuit and Renée Seguin which was adapted to Turkish were used. For the linguistic equivalence of the scale, translations were first made in Turkish. The necessary statistical analyses were applied after the translation procedures and implementation. For the reliability studies of the scale, internal consistency coefficient Kuder Richardson and item total correlation analysis were applied. For the validity studies, the feedbacks of the expert academicians were analyzed by Kappa analysis and the validity of the contents was examined and the item strength and discriminative power of each item in the measure were calculated. The Kuder Richardson score for the reliability of the CDAS was found to be 0.79 for the groups scales applied. The high KR-20 values in the applications showed that the internal consistency of the test was high. With reference to the expert opinion, the validity of content and linguistic equivalence studies were found to be sufficient. These results suggest that the Child Development Assessment Scale is valid and reliable for children aged 5 years.