endoscope (1) includes a first curved portion and (23a) a second curved portion and (23b) curved portion having a (23), a second curved portion of the distal end portion of (23b) a wire guide member having a distal portion which is fixed to the inside (101), a bending operation portion for bending operation a first bend portion by pulling the operating wire (50) (23a) and (67) ing. Further endoscope (1), when the first curved portion (23a) is curved, the curvature direction of the first curved portion (23a) a second curved portion (23b) is curved in the opposite direction , the bending portion (23) to be curved in an S-shape, and a regulating wire for regulating the bending of the bending portion (23) (103).内視鏡(1)は、第1の湾曲部(23a)と第2の湾曲部(23b)とを有する湾曲部(23)と、第2の湾曲部(23b)の先端部の内部に固定されている先端部を有するワイヤガイド部材(101)と、操作ワイヤ(50)を牽引することで第1の湾曲部(23a)を湾曲操作する湾曲操作部(67)とを有している。また内視鏡(1)は、第1の湾曲部(23a)が湾曲した際に、第1の湾曲部(23a)の湾曲方向とは逆方向に第2の湾曲部(23b)が湾曲し、湾曲部(23)がS字形状に湾曲するように、湾曲部(23)の湾曲を規制する規制ワイヤ(103)とを有している。
