[Object] 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.[Solution Means] A covering member 6 is formed so as to be guided by a guide portion 4e to a stopper portion 4h from its housed posture within a holding portion main body 4c so that a projection 6a engages with an engagement portion 4f while being urged by a spring 7 to a covering posture so that the engagement is released and the covering member covers a needle exposed portion 2a, a return preventive portion 4j is joined from a stopper portion 4j toward the base end, and furthermore, a returning movement limiting portion 4m is formed at a holding portion main body 4c so as to be positioned closer to the base end side than the stopper portion 4h and closer to the tip end side than the returning movement terminal 4w of the return preventive portion 4j while being spaced to the base end side from the projection 6a positioned at the stopper portion 4h so as to face the projection while leaving a space S, and comes into contact with the projection 6a lifted from the stopper portion 4h within the range of the space S.
