Öz
With the changing and developing conditions, people's expectations from the places have also been affected and the concept of 'accessibility' has gained more importance. Structures whose user is everyone must meet the needs of users. Universal design concept; It is a holistic approach that allows everyone to use it regardless of users’ personal characteristics. In the study, libraries were discussed because of the diversity in the user base and the many functions in their structure. In the light of the declarations published by The International Federation of Library Associations and Institutions (IFLA), data on the accessibility of interior design in libraries were presented and the issue of universal design in the interior design of Karadeniz Technical University Faik Ahmet Barutçu Library was discussed. Thus, it is aimed to draw attention to the importance of universal design principles by offering suggestions to increase the efficiency of use in library buildings.