And includes an operation unit , an insertion portion provided to be rotatable with respect to the operation unit , and a rotary knob to be operated when turning the insertion section about the axis of the insertion portion to the operation unit the endoscope is provided on the outer peripheral surface of the rotary knob , and the insertion portion neutral position notifying unit for notifying a neutral position with respect to the rotational direction of the insertion section , provided in the operation section , the insertion section neutral position notifying unit and the endoscope operating section neutral position notifying unit insertion portion arranged in the rotational axis direction in a row to notice that the neutral position , and are provided two identical angularly spaced to each other across the operating section neutral position notifying unit in the circumferential direction is , the insertion portion is provided with , a notification ring with a rotation angle notifying unit for notifying that it has predetermined angular rotation around the axis .操作部と、操作部に対して回動可能に設けられた挿入部と、操作部に対して挿入部を該挿入部の軸回りに回動させる際に操作される回転つまみと、を具備する内視鏡は、回転つまみの外周面に設けられ、挿入部の回動方向に対する中立位置を告知する挿入部中立位置告知部と、操作部に設けられ、挿入部中立位置告知部と内視鏡回転軸方向に一列に配列されて挿入部が中立位置に位置することを告知する操作部中立位置告知部、及び操作部中立位置告知部を挟んで周方向にそれぞれ同じ角度離間して2つ設けられ、挿入部が軸回りに予め定めた角度回転したことを告知する回転角告知部を備える告知環と、を備えている。
