Traditional walls have long been used in operating rooms. These walls have met the needs of their time, but with the passage of time and the advancement of technology, the need for new operating rooms using modular walls is strongly felt. New products such as steel with antibacterial coating have been used for many years in developed countries due to the problems in using tiles as a coating for operating room walls and sanitary spaces. The modular system in Europe is more than forty years old and since 2015 in the GCC countries including the UAE, Qatar, Bahrain, Kuwait, Oman and Saudi Arabia, as well as Iraq and Turkey, the use of tiles of any size in all spaces. Operating room is prohibited. In Iran, since 2014, after compiling the standard books of Safe Hospital in the Ministry of Health, pages 323 and 324 of modular materials, made of steel panels with antibacterial paint, have been considered as the best wall joinery material in the operating room. In another part of the eighth volume of the standard, the antibacterial properties of many operating room spaces such as operating room, sub-sterile, scrub, anesthesia induction room, equipment storage and … have been made mandatory. The use of modular walls (whether made of glass or steel) in the operating room has many advantages over traditional operating rooms.