The invention relates to the structure of a vein indwelling needle, especially a vein indwelling needle which can prevent stabbing, including a cannula, a catheter seat, a protective seat, a needle seat and a puncture needle. The protection seat is provided with a through hole, a spring piece and a card. When the puncture needle exits the sleeve and catheter seat, the card and spring piece can be used to limit the moving range of the puncture needle and prevent the puncture end of the puncture needle from exposing the outside of the protection seat.本創作係關於一種靜脈留置針之構造，尤指一種可防止刺傷之靜脈留置針之構造，包含有一套管、一導管座、一保護座、一針座及一穿刺針。其中，保護座中設有一通孔、一彈片及一卡片，可於穿刺針退出套管及導管座時，利用卡片及彈片限制穿刺針的移動範圍，可防止穿刺針之穿刺端露出保護座外部。
