The invention relates to an attachment for a syringe or carpule, comprising a main body (3) that encloses an interior space (7), into which a protrusion of the syringe or carpule can be inserted, the main body (3) having a jacket (5) surrounding the interior space (7), and comprising an inner body (9) connected to the jacket (5) and arranged coaxially thereto, the inner body having an inner wall (11) that, in the attached state of the attachment (1), contacts an outer surface of the protrusion or of the syringe or carpule by means of an interior surface (13) facing the interior space (7). Said attachment is characterised in that the inner wall (11) of the inner body (9) is connected to the jacket (5) of the attachment (1) by means of a number of webs (15), wherein at least one web (15) encloses an angle a together with an imaginary radially extending line, the angle a being greater than 0° and acute.
