The medical resin hollow needle 1 includes a distal end portion 3 having a puncture end portion 2, a large diameter portion 4 having a diameter larger than the distal end portion 3, a tapered portion 6 provided between the large diameter portion and the distal end portion, a hub Section 5. The distal end portion is provided at a side of a predetermined length proximal side from the distal end 2 a and a predetermined length distal side from the tapered portion, and has a hole 7 for communicating the inside and the outside of the hollow needle, and a tapered piercing end portion 2. The tip portion 3 has an overall length L of 7 to 14 mm, a maximum outer diameter R of 1.5 to 3.0 mm, the tapered portion 6 has a length O of 0.3 to 4.7 mm, a taper angle (taper divergence angle) of 10 to 50 degrees, the large diameter part 4 has a length N of 4 mm or more, and the tip outer diameter Q is larger than the maximum outer diameter R of the tip part 3 by 0.6 to 3.0 mm.医療用樹脂製中空針1は、穿刺端部2を有する先端部3と、先端部3より大径の大径部4と、大径部と先端部間に設けられたテーパー部6と、ハブ部5とを備える。先端部は、先端2aより所定長基端側かつテーパー部より所定長先端側に設けられ、中空針の内部と外部とを連通する孔7と、テーパー状の穿刺端部2とを備える。先端部3は、全長Lが7~14mm、最大外径Rが1.5~3.0mm、テーパー部6は、長さOが0.3~4.7mm、テーパー角(テーパー拡がり角)が10~50度、大径部4は、長さNが4mm以上、先端外径Qが先端部3の最大外径Rよりも0.6~3.0mm大きいものとなっている。
