An apparatus comprises a high-frequency electric path (97). High-frequency electric path (97) having an electric connection portion which performs the operation of connecting a sheath portion side electric path (40) and a handle portion side electric path (95) along with the operation of connecting the sheath portion (5) and the handle portion (4). Electric connection portion having an outer peripheral flange portion (33b) and an engaging portion (46) which removably engages with the outer peripheral flange portion (33b). Engaging portion (46) being equipped with an urging portion (94b) which is switched between a non-pressure-contact position where the urging portion (94b) is held out of pressure-contact with the outer peripheral flange portion (33b) when the sheath portion (5) is coupled to the handle portion (4) and a pressure-contact position where the urging portion (94b) is brought into pressure-contact with the outer peripheral flange portion (33b), the urging portion (94b) permitting conduction between the sheath portion side electric path (40) and the handle portion side electric path (95) at the pressure-contact position.
