The invention relates to a syringe closure (1) for a syringe (5) having a main body (7), a projection (9) located at the end thereof, which proceeds from the main body (7) and has a free end (11) and a base (15) arranged on the main body (7), wherein at least one depression (13) is provided on the projection (9) at a distance from the free end (11) thereof, wherein, in order to close the syringe (5), the syringe closure (1) can be placed over the free end (11) of the projection (9) in such a manner that the syringe closure (1) engages over the at least one depression (13) in the projection (9). The syringe closure (1) is characterised by a locking means (25) having at least one locking element (27), which assumes a release position when in a first functional position after the syringe closure (1) has been placed onto the projection (9), and which ensures a form fit with the at least one depression (13) on the projection (9) when in a second functional position, the locking position, and thus holds the syringe closure (1) in a locking manner on the projection (9).
