The puncture device (1) is curved in an arc shape and supported so as to be rotatable around a shaft (J1) as a pivot, and has a puncture needle (31) having a needle point puncturing a living body by turning and a puncture needle , A urethral insertion member (4) having a rectilinear urethral insertion part (41) and having a urethral insertion part (41) inserted into the urethra, a puncture needle (31) and a urethral insertion member (4) And a frame (2) which is connectable and supports the puncture needle so as to be rotatable, wherein the trajectory (plane f 9) of the tip of the needle point of the puncture needle (31) when the puncture needle rotates is a urethral insertion portion ( 2) of 20 to 60 with respect to the plane (f 2) having the normal line (41) as a normal.穿刺装置（１）は、円弧状に湾曲し、軸（Ｊ１）を回動中心として回動可能に支持されており、回動することにより生体を穿刺する針先を有する穿刺針（３１）と、直線状をなす尿道挿入部（４１）を有し、尿道挿入部（４１）が尿道内に挿入される尿道挿入部材（４）と、穿刺針（３１）と尿道挿入部材（４）とを連結可能であり、前記穿刺針を回動可能に支持するフレーム（２）とを備え、穿刺針が回動した際の穿刺針（３１）の針先の軌跡（平面ｆ９）は、尿道挿入部（４１）を法線とする平面（ｆ２）に対して、２０～６０°の傾斜角（θ２）で傾斜している。
