A needle-equipped outer cylinder 1 is formed of a needle tube 3, a joining member 4 including a needle tube accommodation hole 42 for accommodating a proximal end side portion of the needle tube and a joining outer peripheral portion 47 an outer diameter of which is reduced, and an outer cylinder member 2 provided with a distal end joint 22 including an inner cavity 26 capable of receiving the joining member 4 from a distal end side. The outer cylinder member is provided with a projection 28 provided on a proximal end portion of the inner cavity 26, and the joining member is provided with an abutment portion 48 which abuts the projection of the outer cylinder member. The joining member 4 is inserted into the inner cavity of the outer cylinder member, and the projection 28 of the outer cylinder member abuts the abutment portion of the joining member 4. The joining member 4 is fixedly joined to the outer cylinder member and the needle tube by a heat welded portion 45 formed in a position on a proximal end side from a distal end of the distal end joint by a predetermined length.