Liquid injection needle and liquid injection device

摘要

A liquid injection needle ( 10 ) includes a hollow needle part ( 2 ) for injecting a liquid ( 8 ) and a supporting part ( 3 ), to which the needle part ( 2 ) is fixed. The needle part ( 2 ) includes an anchoring part ( 22 ) that extends through the inside of the supporting part ( 3 ) and a puncturing part ( 21 ) that extends from the supporting part ( 3 ) for making a puncture in a living body. The puncturing part ( 21 ) has a distal side outer diameter equal to or greater than 0.1 mm and equal to or less than 0.25 mm, and a proximal side outer diameter than the distal side outer diameter.