A puncture needle including: an elongated approximately-linear main body a distal end portion that is located at a distal end of the main body and that has a blade surface formed of a distal end surface which is formed inclined with respect to a longitudinal direction and a bending portion that is provided between the main body and the distal end portion to connect the main body to the distal end portion and that can be passively bent in response to an external force. The distal end portion functions as a bending-direction control portion for setting a bending direction of the bending portion to a direction in which the blade surface is made to face toward an inner side of a bent shape.
