Medical needle

e h c a f aj h m c h w j a h a h To provide a syringe in which a covering member whose engagement has been released automatically moves to a projection movement terminal where it can be prevented from returning, and returning of a projection positioned at the projection movement terminal can be limited.A covering member is formed so as to be guided by a guide portion to a stopper portion from its housed posture within a holding portion main body so that a projection engages with an engagement portion while being urged by a spring to a covering posture so that the engagement is released and the covering member covers a needle exposed portion , a return preventive portion is joined from a stopper portion toward the base end, and furthermore, a returning movement limiting portion is formed at a holding portion main body so as to be positioned closer to the base end side than the stopper portion and closer to the tip end side than the returning movement terminal of the return preventive portion while being spaced to the base end side from the projection positioned at the stopper portion so as to face the projection while leaving a space S, and comes into contact with the projection lifted from the stopper portion within the range of the space S.