The present invention relates to a connection device that is used for connecting a wiper blade (800) comprising an elastic wiper profile (6), an arc-shaped elastic metal vertebra (5) and a bracket (3) preferably directly fixed to the vertebra (5) at the longitudinal middle region, to a wiper arm (900) of which one end is connected to a motor in the vehicle, that comprises the bracket (3), an adapter (1) connected onto the said bracket (3) so as to rotate around the said rotational axis (901) and the free end (9) of the said wiper arm (900) that can be inserted and locked over the said adapter (1).