There is provided an injection needle, including a needle tube having a discharging port at a needle point for discharging a treatment liquid, the needle tube including a stabbing tube 32 having a blade surface 32C with the discharging port 32D formed thereon, and a main needle tube 31 which is thicker than the stabbing tube 32, with the stabbing tube 32 provided on a tip portion of the main needle tube 31, wherein the stabbing tube 32 satisfies a dimension condition such that an outer diameter is 70 µm or less (not including zero), and an inner diameter is 40 µm or less (not including zero), and a tilt angle ¸ of the blade surface 32C with respect to a central axis of the stabbing tube satisfies a condition of 30° <； ¸ ‰¤ 45°.
