Patent ID: 8308747

Claim:
A puncture device for moving a puncture element in a piercing direction toward a target site and for piercing the target site with the puncture element, the puncture device comprising: a first member which is movable in the piercing direction and in an evacuating direction opposite to the piercing direction; a second member which is for retaining the puncture element, and which is movable in the piercing direction and in the evacuating direction; and a third member which is rotated as the first member moves, and is for moving the second member in the piercing direction and in the evacuating direction by a rotational motion, the puncture device further comprising: a piercing depth adjusting mechanism of adjusting a piercing depth of the puncture element to the target site by regulating a rotation angle of the third member, wherein the piercing depth adjusting mechanism includes an engaging part for engaging with the third member, and includes a displacement member for displacing an engaging position of the engaging part in the third member; the first member includes a recess with an inclination part inclined relative to the piercing direction and to the evacuating direction; and the engaging part engages with the first member at the recess.