An endoscope includes a bending operation input unit which includes a bending operation input section configured to perform a bending operation of a bending section, and which is removably attached to an operation section body, and an activated portion which is provided in the bending operation input unit, and which is configured to change its activated state in response to the bending operation in the bending operation input section. The endoscope includes an activated state detector which is provided in the operation section body to be electrically insulated from the activated portion, and which is configured to detect the activated state of the activated portion, and a bending operation detector which is configured to detect the bending operation in the bending operation input section in accordance with the activated state of the activated portion detected by the activated state detector.
