Abstract: The subject of the invention is an attachment (3) of a wiper device, designed for fastening in a wiper arm (5) by a snap-fit connection, designed and configured for its connection to a connector (2) for fastening the wiper blade (1), wherein said snap connection has a yielding lock button (7), secured by a flexible tongue (8) to at least one of the end surfaces (11, 12) of the attachment (3), wherein said yielding lock button (7) is able to fit into a corresponding opening (15) of the wiper arm (5) and is able to snap in the wiper arm (5) when the attachment (3) of the wiper device is pressed into the wiper arm (5), characterized in that it has at least one locking wedge, configured to cooperate with the yielding lock button (7), on whose surface of the locking wedge (10) the yielding lock button (7) can move if it is tilted from the position of equilibrium, while the flexible tongue (8) is not tensioned.