The endoscope 1 includes an operation portion 3 connected to a proximal end of a rigid insertion portion 2 having a longitudinal axis, and an operation portion 3 provided on the distal end portion of the insertion portion 2 around the first axis 27 orthogonal to the longitudinal axis and on the longitudinal axis An optical element 29 disposed so as to be rotatable around a parallel second axis X, and an optical element 29 disposed on the operation part 3 and rotating around the third axis 23 orthogonal to the third axis 23 and the fourth axis X in the front-A first transmission member 24 for transmitting a turning force about the first shaft 27 by tilting operation of the operation member 8 around the third shaft 23 to the optical element, and an operation member 8 And a second transmission member 12 which transmits rotation about the second axis X to the optical element 29 by tilting operation around the fourth axis X of the second transmission member 12.内視鏡1は、長手軸を有する硬質な挿入部2の基端に連設された操作部3と、挿入部2の先端部分に長手軸に直交する第1の軸27回りおよび長手軸に平行な第2の軸X回りに回動自在に配設された光学素子29と、操作部3に配設され、直交する第3の軸23回りおよび第4の軸X回りの前後左右に回動自在な1つの操作部材8と、操作部材8の第3の軸23回りの傾倒操作によって第1の軸27回りの回動力を光学素子に伝達する第1の伝達部材24と、操作部材8の第4の軸X回りの傾倒操作によって第2の軸X回りの回動を光学素子29に伝達する第2の伝達部材12と、を備えている。
