Connection device between a wiper arm and a wiper blade

The device (7) has an attaching unit (8) provided on a wiper blade and a connection unit (25) e.g. connection pivot, connected with a wiper arm. Liquid is circulated in a channel (16) that is emerged on the connection unit. A pipe (15) extends from extension of the device according to a longitudinal direction (OX) and in communication with the channel, where the channel is arranged transversely with the pipe. The pipe is placed in a base plate (11) surmounted by a side (22) in which the channel and the connection unit are partially placed.