Flushing device for street cleaning vehicles, characterized in that it is made up of a frame (1) that includes fixing means (2) to the cleaning vehicle in question, frame (1) in which are defined two end plates (3) between which two parallel guides (4-4') are welded, including windows (5) through which the corresponding bars or flushing pipes can emerge, frame on which it is mounted with detachable character a tube or main flushing pipe (10) equipped with a plurality of pressurized water application nozzles (11), parallel guides (4-4') on which the respective carriages (12) can move, to those that are linked in opposite directions to the respective second and third flushing pipes (13-14),with their corresponding lines of pressurized water application nozzles (11), these pipes being laterally movable by means of respective hydraulic pistons (15-15') integral to the main frame (1), connected through the corresponding oil inlets and outlets to a hydraulic control unit established in the cleaning vehicle and which are linked via connectors (16) to the free ends of said second flushing pipe (13) and third flushing pipe (14) respectively, with a removable character.connected through the corresponding oil inlets and outlets to a hydraulic control unit established in the cleaning vehicle and which are linked through connectors (16) to the free ends of said second flushing pipe (13) and third flushing pipe (14) respectively, removable.connected through the corresponding oil inlets and outlets to a hydraulic control unit established in the cleaning vehicle and which are linked through connectors (16) to the free ends of said second flushing pipe (13) and third flushing pipe (14) respectively, removable. (Machine-translation by Google Translate, not legally binding)