The scope of the article includes four works composed by İlhan Usmanbaş for the cello and piano duo. The aim of the researchis to reveal the importance of the works, the way of using the principles of the movements and techniques they are associatedwith, the stages they can be included in the curriculum of the conservatory and institute, and the issues that need to be consideredin their performance. Research data were collected through literature review and interviews and correspondence with experts.The expert group includes composers / theorists and a cello artist who has performed his works by working with the composer.In the introduction part of the article, literature directly related to the subject, the periods in which the composer composed thefour works in question and the composition techniques he used were briefly mentioned. In the findings, all the expert statementsabout form, technical and musical content of each work are given and interpreted in correspondance with the purpose statement.As a result of the research, it has been determined that each of the works in question is one of the first examples of its er a orkind, unique techniques exist in each of them, that together they form a repertoire of wide perspective and that they can befunctional in a wide range within the cello curriculum from high school to undergraduate and graduate levels.