Recently, with the rapid progress and introduction of new machineries and instruments for endoscopic surgery, the connecting lines and cables connecting machineries around the operating field are becoming more and more complicated. The lines and cables are often very troublesome, especially when the operator and assistant change their positions, and sometimes they are not only annoying but also potentially dangerous during the operative procedure. We feel there is a pressing need to develop a device to regulate the lines and cables. We developed a device for regulating the lines and cables in cooperation with Olympus Optical Co, Ltd (Tokyo, Japan) and named it "Line-Hanger." We have used it in more than 30 cases of various kinds of endoscopic surgery. In this study, we compare the usefulness of the "Line-Hanger" with the conventional method: fixation of lines and cables to the drapes with Velcro(R). The girth of the operative personnel are freed from a jumble of cables, and they become ergonomically comfortable. Especially when operator and assistant are changing their position, it becomes very smooth. "Line-Hanger" is extremely useful for endoscopic surgery.