Wiper device for cleaning vehicle windows

The invention relates to a wiper device (100) for the cleaning of vehicle windows, with a wiper arm (10) and a wiper blade (15) exchangeably fastened to the wiper arm (10), wherein the wiper blade (15) is fastened to the wiper arm (10) by means of a wiper blade adapter (40), which engages with an elastically arranged actuating head (52), with the formation of a detent connection, into a corresponding opening (20) of the wiper arm (10), and with a coupling element (25) for feeding a washing fluid to the wiper blade (15), wherein the coupling element (25) consists of plastic and is fastened in the wiper arm (10), wherein the coupling element (25) has a first connecting piece (31), which is able to be connected with a supply line on the vehicle side, and a second connecting piece (32), which engages in a form-fitting manner into a mount (46) of the wiper blade adapter (40), and wherein the connection between the second connecting piece (32) and the mount (46) is sealed by means of a sealing element.