Puncture needle and medical procedure using puncture needle that is performed via natural orifice

摘要

A puncture needle includes: a needle part that has a first needle part and a second needle part that are hollow, adjacent, and have resiliency; and a sheath that retractably accommodates the needle part; in which a bend part that separates distal end sides of the first needle part and the second needle part to be further apart than proximal end sides thereof is provided in at least one of the first needle part and the second needle part.