A kind of puncture auxiliary is disclosed herein, can be connected with a guid needle and an injection tube. The puncture auxiliary has an ontology, and the ontology has a connected pathways and an at least drainage channel. The connected pathways has a front end and a Hou end, and the prominent what body surface in the front end can then link to link guid needle, Hou end with injection tube. Furthermore the drainage channel is the surface for setting what ontology, is connected to form fluid communication with the Hou end of connected pathways, leaves the ontology to guide fluid.在此揭示一種穿刺輔件，可用以連結一導引針和一注射筒。所述之穿刺輔件具有一本體，且所述本體具有一貫穿通道及至少一引流通道。所述貫穿通道，具有一前端與一後端，且所述前端突出於本體表面用以連結導引針，後端則可與注射筒連結。再者，所述引流通道，係設於本體之表面，與貫穿通道之後端相連形成流體連通，用以導引流體離開該本體。
