This creation is to provide an injection syringe, which is mainly provided with a needle tube portion, a convex body is provided at the bottom of the needle tube portion, a compression portion is provided above the needle tube portion, and a positioning plate is provided between the needle tube portion and the compression portion, The positioning plate is provided with a perforation. The bottom of the positioning plate is provided with a fixing seat. The fixing seat is provided with a groove. The convex system of the needle tube portion corresponds to the groove of the fixing seat. The bottom edge of the fixing seat is provided. There are several guiding grooves communicating with the groove. Positioning blocks are provided on the outer wall surface of the positioning plate. A pressing portion is provided above the compression portion. The middle portion of the pressing portion is a puncturing surface. Both sides of the pressing portion An extension piece is provided, and a hook is provided on the bottom surface of the retaining piece for interlocking with the positioning block of the positioning plate. A needle is fixed on the perforation of the positioning plate, and the bottom end of the needle is It is connected to the groove of the fixing seat, the needle is located in the compression part, and the needle tip of the needle is located below the puncture surface of the pressing part. In this way, the needle, the needle tube and the medicine are set as an integrated type, and the needle can be hidden To prevent getting stuck Yu.
