The aim of this research is to examine the level of European Credit Transfer System tools in Vocational Secondary School in Erasmus+ mobility projects carried out and granted by the Turkish National Agency. European Credit Transfer System tools in Vocational Secondary School has been developed as a tool of policy which aims recognition, verification and transfer of the documents, certificates and diplomas acquired in European Union countries, regardless of where they have been obtained. The data of the research are obtained from school principals, vice principals, branch managers and vocational teachers working at vocational schools which, in the 2019-2020 Erasmus+ project application period, applied to The Turkish National Agency for a grant and announced that ECVET tools would be used. Furthermore, vocational skills, qualifications, certificates and the recognition of the acquisitions obtained abroad by the students within the scope of Erasmus+ mobility project have been evaluated in this study. It has been concluded that vocational school principal, vice principal and teachers use European Credit Transfer System tools in Vocational Secondary School in Erasmus+ mobility projects, apply these tools and consider them to be favorable. In the study, suggestions regarding the application and use of European Credit Transfer System tools were made for the institutions that are planning to carry out Erasmus+ mobility project in vocational secondary school.