The endoscope 1 includes an operation section 3 to be grasped by an operator, an insertion section 2 rotatable with respect to the operation section 3, a swible swiver by a hand gripped by an operator provided on the operation section 3 A towing / loosening member 36, 45 which is towed and relaxed by advancing and retracting in the operating portion 3 by a swing operation of the swing portion 30, and a deforming portion 53 which is deformed by pulling / loosening of the pulling members 36, 45 , And a braking unit 50 for restraining or releasing the rotation of the insertion unit 2.内視鏡1は、操作者によって把持される操作部3と、操作部3に対して回動自在な挿入部2と、操作部3に設けられ、操作者が把持した手により切替え自在な切替え部30と、切替え部30の切替え操作によって操作部3内で進退移動することで牽引弛緩される牽引弛緩部材36,45と、牽引部材36,45の牽引弛緩によって変形される変形部53を備え、挿入部2の回動を制止または解除する制動ユニット50と、を具備する。
