The invention relates to an improved connection device for an attachment of a self-propelled work machine, comprising a first pivot lever (13), a second pivot lever (14), and a third pivot lever (15). The first pivot lever (13) can be or is connected to the work machine such as to be drivable (18) and pivotable (27). The second pivot lever (14) is connected to the first pivot lever (13) such as to be drivable (28) and pivotable (27). The third pivot lever (15) is connected to the second pivot lever (14) such as to be drivable (32) and pivotable (31) and can be or is connected (29) to the attachment. The pivot pins (27, 31) of the second pivot lever (14) are vertically adjustable relative to one another.
