NEEDLE TUBE, MEDICAL INSTRUMENT, AND METHOD FOR MANUFACTURING MEDICAL INSTRUMENT

摘要

[Object] To prevent a needle tube from dropping out of a holding member for holding the needle tube without executing any surface treatment on the needle tube or the holding member. [solving Means] A syringe needle assembly 1 has a needle tube 2 and a hub 3. The needle tube 2 has a tubular needle 4 and a enlarged portion 5. The tubular needle 4 is provided with a needlepoint which can be punctured into a living body. The enlarged portion 5 is annularly formed so as to be continuous in the circumferential direction of the tubular needle 4 by executing press working on the tubular needle 4 in the axial direction. The hub 3 has a fitting portion 38a to which the enlarged portion 5 of the needle tube 2 is fitted, and holds the needle tube 2.