Abstract: A device for the injection of posts into ear lobes including a barrel with a grip, a bolt disposed in the barrel which can be cocked against a spring which is releasable by means of a release lever. Retaining devices are included on which may be provided, in front of the barrel and, a post and, at a distance from it and aligned with it, a locking element. For achieving an embodiment which is easy to operate and satisfies high sanitary requirements, the retaining devices have fastening devices for the releasable fastening of retaining elements which support the post and the locking element.