An ultrasonic puncture needle used in combination with an ultrasonic endoscope including a distal-end hard part, a bendable part, and an operation part, includes: a sheath inserted into an insertion channel of the ultrasonic endoscope a needle tube that includes an opening a releasing mechanism that releases a substance. In a state in which the needle tube is disposed inside the bendable part, a periphery of the needle tube receives a force from an inner wall of the insertion channel while the bendable part is in a bent state by the operation part. The needle tube is rotated around a long axis of the insertion channel by the force, such that an axis line matching the direction of the opening in the needle tube protruding from the insertion channel becomes substantially parallel with an ultrasonic scanning face of the ultrasonic endoscope.
