The present invention relates to a tube assembly for controlling the length of a syringe needle. The tube assembly comprises: a coupling body wherein one end is coupled with a needle assembly having a fixing member coupled to the upper end of a syringe cylinder and a syringe needle coupled to the fixing member and a control tube formed to enable control of exposure length of the syringe needle by being movably coupled to the coupling body along a longitudinal direction of the syringe needle. The coupling body comprises: a coupling part formed on a lower side thereof to be inserted into and coupled to the fixing member, and a through-hole formed therein in order for the syringe needle to penetrate the through-hole and to protrude out of the front end.【課題】注射針の長さ調節用管組立体を提供する。【解決手段】本発明は、注射器のシリンダー上端に結合される固定部材と、固定部材に結合された注射針とからなる針組立体に結合し使用され、下側には固定部材に嵌合するように結合部が形成され、内部に注射針が貫通して先端に突出するための貫通口が形成された結合体と、注射針の長手方向に沿って移動可能に結合体に結合され、注射針の露出の長さを調節できるように形成された調節管とを含んでなる。【選択図】図1
