As a structural improvement of an optical fiber needle,The optical fiber needle is used for He Ne laser.Including pipe body,Optical fiber,Cap body and needle part,A through hole is formed on one side of the passage through the inner part of the pipe body.And an optical fiber with a diameter between 0.32 and 0.42mm is penetrated in the channel.And one side of the optical fiber is fixed at the through hole.The other side extends out of the tube body.The outer side of the tube is further provided with a cap body.And a penetration space for the optical fiber to pass through is formed inside the cap body.On the other side of the penetration space, a through-hole with a reduced aperture is formed.A fixing seat with a needle part can be positioned in the cap body.And one side of the fixing seat is extended with a needle tube through the hole to the outside of the cap body.And a hole with a diameter of 0.43mm and through which the optical fiber passes through is arranged inside the needle.Because the diameter of the hole is slightly larger than the diameter of the optical fiber,So when the optical fiber needle is in use,It can avoid bending of optical fiber.Fracture, etc.Then improve the safety of intravenous irradiation.本創作為有關一種光纖針頭之結構改良，該光纖針頭為應用於氦氖雷射，係包括管體、光纖、帽體及針部，其中該管體內部所貫通之通道一側形成有透孔，並於通道中穿設有直徑為介於0.32~0.42毫米間之光纖，且光纖一側為固定於透孔處，而另側延伸出管體外部，再於管體外側套設有帽體，並於帽體內部形成有供光纖穿過之穿置空間，而穿置空間另側形成有縮小孔徑之通孔，即可再於帽體內定位有針部之固定座，且固定座一側延伸有穿出通孔至帽體外部之針管，而針部內部貫通設有直徑為0.43毫米且供光纖穿過之穿孔，其因穿孔的直徑為略大於光纖的直徑，所以當光纖針頭於使用時，即可避免光纖產生彎折、斷裂等情況，進而提升靜脈照射時的安全性。
