Provided is a sheath (2) for an endoscope, the sheath (2) being provided with: a sheath body (5) having an elongated rotatable section (5A) on the distal end side, the rotatable section (5A) being connected so as to be relatively rotatable about a longitudinal axis (A), the sheath body (5) also having a stationary section (5B) on the proximal end side a first passage (7) formed along the axis (A) in the body (5) a second passage (8) formed in the body (5) so as to be parallel to the passage (7) a lead-out opening (9) open on the outside radially of the body (5), the lead-out opening (9) allowing the proximal end portion of an injection needle (1) having been inserted in the passage (8) to be led out therethrough, the lead-out opening (9) being capable of circumferentially changing the lead-out position of the needle (1) relative to the stationary section (5B) according to the relative rotation of the stationary section (5B) and the rotatable section (5A) and a plurality of holding sections (61, 63) provided to the stationary section (5B) at a circumferential distance from each other, the plurality of holding sections (61, 63) circumferentially affixing an injector (3), which has the needle (1), relative to the stationary section (5B) at a position where the needle (1) protrudes from the distal end of the body (5), the plurality of holding sections (61, 63) releasing the injector (3) at a position where the needle (1) is received into the body (5).Linvention fournit une gaine pour endoscope (2) qui est équipée : dun corps principal de gaine (5) qui possède une partie rotation (5A) longue et fine côté extrémité avant raccordée de manière à permettre sa rotation relative autour dun axe longitudinal (A), et une partie fixation (5B) côté extrémité de base dun premier trajet (7) formé sur le corps principal (5) suivant laxe longitudinal (A) dun second trajet (8) formé sur le corps principal (5) en juxtaposition avec le premier trajet (7) dune sortie (9) qui souvre côté
