PROBLEM TO BE SOLVED: To provide a lighting system for a surgical operation in which a surgeon can easily control an illumination direction with a manual operation, a surgical field can be illuminated constantly and properly regardless of the change of a posture of a patient and the depth of an incision site, and an optic fiber is not damaged in a sterilization treatment.SOLUTION: A lighting system for a surgical operation comprises: a support body a light source part for generating light an irradiation part having at least one condenser lens and posture holding means for holding an operation posture of the irradiation part. A flexible tube of the posture holding means is covered by a flexible tube-like cover 6 with air-tightness.COPYRIGHT: (C)2015,JPO&INPIT【課題】術者が手操作で簡単に照明方向を操作でき、患者の体位変更や切開部位の深部にかかわらず、術野を常に適切に照明でき、また、滅菌処理において光ファイバーを損傷することがない手術照明装置を提供すること。【解決手段】支持本体、光を発生させる光源部、少なくとも1枚の集光レンズを備えた照射部、及び前記照射部の操作姿勢を保持する姿勢保持手段からなり、その姿勢保持手段のフレキシブルチューブを可撓性チューブ状カバー6によって気密性を持たせて被服してある。【選択図】図1