The invention relates to an operating drape formed by an impermeable web that has a window (3) for access to the operating site, characterized in that the web consists of two impermeable sheets (10,20) held together, one along the extension of the other, in a sealed manner by an adhesive that allows the sheets to be separated by peeling and in that the window (3) is shared between the two sheets. The invention applies in particular to operating drapes used in surgery.