This study is a proposal for the positive application of collage techniques into the process of interior design. For that, we need to set up the appropriate definitions of collage and to analyze its properties as a creative design methode of that field, in the basis of the twentieth-century art history. The study is divided into three sections as follows: 1) The traces of collage in the art movements such as Cubism, Dada, Surealism, and Pop art will be researched in terms of art concepts, appearances and, properties. 2) The relationships between collage and the main ideas of those art movements, as mentioned above, will be discussed for proving that collage is such an effective techniques as to erdxxly Post-modem ideas. 3) The examples of collage techniques and their effects appearing in Post-modem interior spaces will be surveyed for the purpose of proving its abilities as a creative design methode in interior design. Further studies should be succeeded for suggesting practical and educational models of its application.