Plug-in connection with retaining element and retaining element for this purpose

The present disclosure relates to a plug-in connection (10), in particular for hydraulic hose lines. The plug-in connection (10) may comprise a first plug connector part (1) having a circumferential groove on a plug-in nipple (3), a plug-in sleeve (3) as the female part having two transverse bores (9), a fork- shaped coupling bracket (5). The fork-shaped coupling bracket (5) may comprise two bracket portions (7) and one bracket curve (6), which bracket (5) may be being inserted, in the mounted state of the plug-in sleeve (3) and the plug-in nipple (2), into the transverse bores (9) for locking the plug-in connection to the bracket portions (7) and penetrate the groove (16) transversely with respect to the plug-in axis. A retaining element (30) for retaining the coupling bracket (5) against unwanted release may be provided. The retaining element (30) may comprise an accommodating portion (32) for the bracket curve (6). The retaining element (30) may have two holding arms (31) which are spaced apart from each other, which are connected by means of a base (33) at rear ends of the holding arms facing the accommodating portion (32), and which define at front ends (34) a mounting mouth (35) which can be slipped onto the plug-in nipple (2) and/or the plug-in sleeve (3) in a transverse manner with respect to the plug-in axis (S) of the plug-in connection (10).