Patent ID: 8790312

Claim:
A needle-equipped syringe barrel, comprising: an outer cylinder made of synthetic resin, and having an inner hollow portion and a cylindrical space at one side thereof communicating with the inner hollow portion; a syringe nozzle extending outwardly from the one side of the outer cylinder and integrally formed with the outer cylinder as one unit; a metal needle disposed in the syringe nozzle and having a needle rear end portion protruding into the cylindrical space of the syringe barrel, and a needle tip present on an opposite side of the needle rear end portion, the metal needle having 25 to 34 G in thickness integrally equipped to the syringe nozzle by integral molding; and a convex portion extending to an end of the needle rear end portion at a bottom of the cylindrical space and surrounding an outer surface of the needle rear end portion, wherein an area where the needle contacts with the syringe nozzle falls in a range of 11 to 50 mm 2 , and the needle rear end portion has a height in a range of 0.4 to 3 mm and located only in the cylindrical space.