There is provided an injection-needle cover which is likely to be extended smoothly. The injection-needle cover 30 includes a base portion 32, a base hinges 34, a connected portion fitting space forming portion 36, a connecting hinge 38, and an injection needle enclosure portion 40. The injection needle enclosure portion 40 has paired base-side wall portions 60, a cylinder portion 62, paired tip-end-side wall portions 64, an injection needle contact portion 66, a hook portion 68, and a needle tip end fixing portion 70. The injection needle contact portion 66 is disposed at a position in a base-side axial space 80 which is a boundary between the base-side axial space 80 and an intra-cylinder space 82. The injection needle contact portion 66 has a force receiving portion 100 and a connecting portion 102. The force receiving portion 100 receives a force from the injection needle 24 when the force receiving portion 100 comes in contact with the injection needle 24. The force receiving portion 100 has an easy sliding portion 112. The easy sliding portion 112 is disposed in an area adjacent to an injection needle. The easy sliding portion slides more easily along the injection needle 24 than a case where an edge 114 slides along the injection needle 24.
