Disclosed are a syringe needle assembly and a safety syringe and a safety syringe apparatus using the same. The syringe needle assembly of the present invention comprises: a syringe needle having a needle tip formed at the front end thereof and a safety tube which covers the syringe needle and is connected with the rear end of the syringe needle and which is opened in the injection direction of the syringe needle wherein the safety tube retracts backward from the needle tip when the syringe needle penetrates into the body and the safety tube extends toward the front of the needle tip when the syringe needle comes out of the body. The present invention can provide a syringe needle assembly and a safety syringe and safety syringe apparatus using the syringe needle assembly the syringe needle assembly comprising: a syringe needle having a needle tip formed at the front end thereof and a safety tube which covers the syringe needle and is connected with the rear end of the syringe needle and which is opened in the injection direction of the syringe needle wherein the safety tube retracts backward from the needle tip when the syringe needle penetrates into the body and the safety tube extends toward the front of the needle tip when the syringe needle comes out of the body whereby the syringe needle assembly can be applied to an existing syringe by upgrading the existing syringe without changing the structure thereof and the syringe needle assembly is simple in structure and can be safely and conveniently used.
