Since ancient times, sash windows have been used in old houses, which have had good effects on the architectural space and have caused light to enter the space and also prevent depression. and its use in modern interior architecture. Sashes are latticed wooden windows that are usually decorated with colored glass and go up and down to open and close their housing.These decorative elements are a collection of the nature of mathematical technology, art and mysticism, which are considered Iranian decorative elements by using materials such as wood, glass, paper, plaster, and Alvan colors, along with Alvan techniques, along with their different functions. In this article The use of similar sites and articles as well as related books have been used. The use of sash windows in modern interior architecture enlivens the space and the use of natural sunlight during the day, as well as the creation of a beautiful space, which is described in this article. It is tried to be addressed more.