< Topic >As it can containment the cleanliness of the field of operation, sajikarudorepu which can expand the open-window portion easily without making damage cause and the like, is obtained.SolutionsOpen-window portion 2 is made enlargement possible the flap 4 which was formed to the both sides of 1 places or the multiple place providing and this cut 3 on the one hand, or by looping both from the aperture edge 8 of this open-window portion 2 at flat cloth in those which formed open-window portion 2 in the drape itself 1 which was formed, cut 3.< Choice figure >Drawing 1【課題】術野の清潔を保持することができるとともに、破損等を生じさせることなく、開窓部を容易に拡大することができるサージカルドレープを得る。【解決手段】平布にて形成したドレープ本体1に開窓部2を形成したものにおいて、この開窓部2の開口縁8から切り込み3を1箇所又は複数箇所設け、この切り込み3の両側に形成されたフラップ4の一方、又は両方を折り返すことにより、開窓部2を拡大可能とする。【選択図】図1