| 摘要 |
A safety injector capable of preventing an erroneous needling by pulling the needle tube part of an injection needle into an outer tube after use, comprising a convergently formed tubular lure part and an annular projected part coaxially surrounding the lure part provided at the opening tip part of the outer tube, characterized in that an engagement projected part is formed on the tip side inner surface of the annular projected part; an injection needle for medical treatment used in the safety injector, comprising an injection needle, a needle mounting part fixed to the base part of the needle tube part of the injection needle, and a needle base covering the outside of the needle mounting part with the base side of the needle mounting part left uncovered and holding the needle mounting part by the inner cavity thereof in contact with each other so that the needle mounting part can be separated therefrom, characterized in that an engagement projection is formed on the base part peripheral edge of the needle base, whereby the problems on the needle and the needle base can be solved, and not only a dedicated injection needle but also a general injection needle can be used. <IMAGE>
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