Problem to be solved: to provide a suspending structure for supporting an operation microscope in which a plurality of rotations are simultaneously locked / free by a mechanical structure.Solution: first to third locking means capable of simultaneously rotating the first to third rotary shafts 4, 5 and 6 by mechanically contacting the first to third rotary shafts 4, 5 and 6 by the same transmission power to the lateral surface 10 supporting the first to third rotary shafts 4, 5 and 6, respectively, with the same transmission power； Since 7, 8 and 9 are provided, the first to third rotary shafts 4, 5 and 6 can be mechanically locked.Diagram【課題】機械的構造で複数の回転軸を同時にロック／フリー状態にできる手術顕微鏡支持用吊下構造を提供する。【解決手段】第１～第３回転軸４、５、６を支持する横面部１０、縦面部１１、第二縦面部１２に、それぞれ同一の伝達動力により第１～第３回転軸４、５、６と機械的に接触して第１～第３回転軸４、５、６の回転を同時に停止自在な第１～第３ロック手段７、８、９が設けられているため、第１～第３回転軸４、５、６のロック／フリーを機械的に行うことができる。【選択図】図１
