An endoscope (1) includes a curving direction setting portion (40) which is configured to set the relationship between the rotation direction of the curving operation portion (10) and the curving direction of the curving portion (5) to a first set condition or a second set condition, the first set condition being a condition in which the second operation wire (23b) is pulled by rotating the curving operation portion (10) in the first rotation direction and in which the first operation wire (23a) is pulled by rotating the curving operation portion (10) in the second rotation direction, the second set condition being a condition in which the first operation wire (23a) is pulled by rotating the curving operation portion (10) in the first rotation direction and in which the second operation wire (23b) is pulled by rotating the curving operation portion (10) in the second rotation direction. The curving direction setting portion (40) includes a wire crossing portion (41) in which the first operation wire (23a) and the second operation wire (23b) cross each other in the second set condition. Further, the endoscope (1) includes a movement regulating portion (36I which is configured to regulate the movement of the wire crossing portion (41) from within the operation portion (3) into the insertion portion (2).
