An insertion apparatus (20) includes insertion unit (30), a rotation drive mechanism (100), a first rotation member (110) which is arranged inside the insertion unit 30 and rotates by the rotation drive mechanism (100), a second rotation member (120) which is attached to an outer peripheral surface of the insertion unit (30) and is adjacent to the first rotation member (110), and a helical rotation member (130) which is rotatable in accordance with rotation of the second rotation member (120). The insertion apparatus (20) include a magnetic force generation mechanism (140) which generates a magnetic force that enables the first rotation member (110) and the second rotation member (120) to be attracted to and coupled and enables the second rotation member (120) to rotate follow rotation of first rotation member (110). The magnetic force generation mechanism (140) is arranged at a tubular end portion of the first rotation member (110) and a tubular end portion of the second rotation member (120) adjacent to the end portion.
