Biopsy device and specimen collection method

A biopsy device comprising:

• a hollow needle;
• a wire located inside the needle in a longitudinal direction of the needle and having a helical drill portion at a distal end portion;
• a rotation mechanism configured to move the drill portion in the longitudinal direction, the drill portion protruding from a distal end of the needle and rotating about a longitudinal axis of the wire;
• a long-length sheath covering the needle, the needle and the wire being movable in the longitudinal direction with respect to the sheath;
• and
• an operating unit provided on a proximal side of the needle, the wire, and the sheath, wherein
• the operating unit includes:
• a main body fixed to a proximal end of the sheath;
• a slider fixed to a proximal end of the needle and supported by the main body so as to be movable in the longitudinal direction;
• and
• a knob fixed to a proximal end of the wire, located proximally relative to the slider, and supported by the main body so as to be movable in the longitudinal direction and rotatable about the longitudinal axis,
• the rotation mechanism includes:
• a threaded portion provided on the main body and having a pitch equal to a pitch of the drill portion;
• and
• a joint portion provided on the knob and being engaged with the threaded portion, and
• when the knob moves, with the joint portion engaged with the threaded portion, toward a distal side by being rotated, the slider moves toward the distal side together with the knob while abutting against the knob.