Abstract: A medical needle includes a solid rod-like inner needle to be inserted into the living tissue, and a hollow cylindrical outer tube needle to be inserted into the living tissue together with the inner needle, while the inner needle is inserted into the inner needle. The hollow cylindrical outer tube needle is retained in the living tissue after the inner needle is removed. A tip portion of the inner needle extending out of a front end bore of the outer tube needle is formed as a spherical crown portion capable of being inserted along a punctured hole previously formed in the living tissue so as not to damage the lumen of the punctured hole. Accordingly, it is possible to reduce a pain upon creating a puncture, subcutaneous bleeding and damage to a blood vessel wall, eliminate coring, and an infectious accident.

Abstract: A medical needle which can greatly reduce the pains involved in creating a puncture, avoid subcutaneous bleeding and damage to blood vessel walls by preventing wrong puncture, eliminate the possibility that coring may occur, causing further damage to the living tissue and a part of the living tissue to flow into a blood vessel, can prevent occurrence of infection accidents due to wrong puncture, and thus can assure a high level of safety of health-care workers.