A positioning device for epidural space, at least includes, a epidural needle, which possesses a hollow interior, an ultrasound needle, which is built in the hollow interior of said epidural needle, and connected to the ultrasonic device. A positioning confirming syringe, which is connected to said epidural needle, in order to assure the needle enter the epidural space correctly.一種硬脊膜外腔超音波定位裝置,至少包括:一硬脊膜外套針,其內部係為一空心;一超音波探針,係為置於硬脊膜外套針之內部空心處,並與超音波裝置連接;一定位確認針筒,係與硬脊膜外套針相互連接,用以確認硬脊膜外套針是否順利進入硬脊膜外腔。1‧‧‧硬脊膜外腔之超音波定位裝置11‧‧‧硬脊膜外套針111‧‧‧外套針針管1111‧‧‧外套針針頭112‧‧‧連接筒1121‧‧‧針筒承接部1122‧‧‧探針承接部11221‧‧‧卡榫槽12‧‧‧超音波探針121‧‧‧電極連接部1211‧‧‧卡榫塊122‧‧‧探針針管1221‧‧‧探針針頭13‧‧‧定位確認針筒131‧‧‧套筒1311‧‧‧針筒連接部132‧‧‧推桿
