Heating device for a windscreen-wiper blade and windscreen-wiper blade comprising same

The heating device is able to be assembled to a support element (3) of a wiper blade and comprises a main longitudinal axis element (4) able to be mounted inside a housing (5) of the support element (3) in such a manner as to form a vertebra. A heating element (13) is disposed on a lower face of the vertebra-forming element (4). The vertebra-forming element (4) comprises at least one passage (20) for the passage of electrical conduction means (19) with a view to electrical supply of the heating element (13).