A puncture device (1) includes: a puncture needle (31) curved in an arc, turnably supported around an axis (J1) as a turning center, and having a needle tip which punctures a living body when the puncture needle is turned a urethral insertion member (4) having a urethral insertion portion (41) of a linear shape which is inserted into the urethra and a frame (2) capable of connecting the puncture needle (31) and the urethral insertion member (4) to each other, the frame turnably supporting the puncture needle. When the puncture needle is turned, the needle tip of the puncture needle (31) has a locus (plane f9), which is inclined by an inclination angle (θ2) of 20 to 60 degrees with respect to a plane (f2) orthogonal to the urethral insertion portion (41).
