A medical device is provided, including: a sheath portion (10); a pair of operation wires (30); and a turning operation portion (60) in which the sheath portion (10) is bent in a direction corresponding to the pulled one operation wire (30) through a turning operation. The turning operation portion (60) includes a wire fixation panel (64) around which the operation wires (30) are wound on a side peripheral surface; and a penetration portion (63c) and a closing portion (63d) which are provided further radially outwards than the side peripheral surface of the wire fixation panel (64) and at a position facing the side peripheral surface, so as to be integrated with the wire fixation panel (64).
